Revert "Dart SDK roll for 2018/09/06 (flutter#6189)" (flutter#6192)

This reverts commit f02fc8c.

DEPS

@@ -31,7 +31,7 @@ vars = {
   # Dart is: https://github.com/dart-lang/sdk/blob/master/DEPS.
   # You can use //tools/dart/create_updated_flutter_deps.py to produce
   # updated revision list of existing dependencies.
-  'dart_revision': 'c7ab56e1b5ab9bcf6f20057ac9135dede7d40395',
+  'dart_revision': '760a9690c22ec3f3d163173737f9949f97e6e02a',
 
   'dart_args_tag': '1.4.4',
   'dart_async_tag': '2.0.8',

ci/licenses_golden/licenses_third_party

@@ -1,4 +1,4 @@
-Signature: cd0d6dca1aa2aca73d1f1dab47cf9355
+Signature: da77c336d1e2756b2cca2e2d00f2d741
 
 UNUSED LICENSES:
 
@@ -5461,7 +5461,6 @@ FILE: ../../../third_party/dart/runtime/vm/compiler/backend/code_statistics.cc
 FILE: ../../../third_party/dart/runtime/vm/compiler/backend/code_statistics.h
 FILE: ../../../third_party/dart/runtime/vm/compiler/compiler_pass.cc
 FILE: ../../../third_party/dart/runtime/vm/compiler/compiler_pass.h
-FILE: ../../../third_party/dart/runtime/vm/compiler/compiler_state.h
 FILE: ../../../third_party/dart/runtime/vm/compiler/frontend/base_flow_graph_builder.cc
 FILE: ../../../third_party/dart/runtime/vm/compiler/frontend/base_flow_graph_builder.h
 FILE: ../../../third_party/dart/runtime/vm/compiler/frontend/bytecode_reader.cc
@@ -16699,50 +16698,6 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ====================================================================================================
 
-====================================================================================================
-LIBRARY: tonic
-ORIGIN: ../../../garnet/LICENSE
-TYPE: LicenseType.bsd
-FILE: ../../../third_party/tonic/dart_list.cc
-FILE: ../../../third_party/tonic/dart_list.h
-FILE: ../../../third_party/tonic/file_loader/file_loader_fuchsia.cc
-FILE: ../../../third_party/tonic/file_loader/file_loader_posix.cc
-FILE: ../../../third_party/tonic/file_loader/file_loader_win.cc
-FILE: ../../../third_party/tonic/filesystem/filesystem/path_win.cc
-FILE: ../../../third_party/tonic/filesystem/filesystem/portable_unistd.h
-FILE: ../../../third_party/tonic/platform/platform_utils.h
-FILE: ../../../third_party/tonic/platform/platform_utils_posix.cc
-FILE: ../../../third_party/tonic/platform/platform_utils_win.cc
-----------------------------------------------------------------------------------------------------
-Copyright 2017 The Fuchsia Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-====================================================================================================
-
 ====================================================================================================
 LIBRARY: tonic
 ORIGIN: ../../../third_party/tonic/LICENSE
@@ -16842,6 +16797,50 @@ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ====================================================================================================
 
+====================================================================================================
+LIBRARY: tonic
+ORIGIN: ../../../third_party/tonic/file_loader/file_loader_fuchsia.cc + ../../../third_party/tonic/LICENSE
+TYPE: LicenseType.bsd
+FILE: ../../../third_party/tonic/dart_list.cc
+FILE: ../../../third_party/tonic/dart_list.h
+FILE: ../../../third_party/tonic/file_loader/file_loader_fuchsia.cc
+FILE: ../../../third_party/tonic/file_loader/file_loader_posix.cc
+FILE: ../../../third_party/tonic/file_loader/file_loader_win.cc
+FILE: ../../../third_party/tonic/filesystem/filesystem/path_win.cc
+FILE: ../../../third_party/tonic/filesystem/filesystem/portable_unistd.h
+FILE: ../../../third_party/tonic/platform/platform_utils.h
+FILE: ../../../third_party/tonic/platform/platform_utils_posix.cc
+FILE: ../../../third_party/tonic/platform/platform_utils_win.cc
+----------------------------------------------------------------------------------------------------
+Copyright 2017 The Fuchsia Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+====================================================================================================
+
 ====================================================================================================
 LIBRARY: tonic
 ORIGIN: ../../../third_party/tonic/typed_data/dart_byte_data.cc + ../../../third_party/tonic/LICENSE

frontend_server/lib/server.dart

@@ -39,11 +39,6 @@ class _FlutterFrontendCompiler implements frontend.CompilerInterface{
     _compiler.acceptLastDelta();
   }
 
-  @override
-  Future<Null> rejectLastDelta() async {
-    return _compiler.rejectLastDelta();
-  }
-
   @override
   void invalidate(Uri uri) {
     _compiler.invalidate(uri);