Bug 1878433 Part 3 - Sort #includes in nsCanvasFrame.cpp, and removed…

… some unused ones. r=dholbert

Also, remove the following because they are not used.

- #include "AccessibleCaretEventHub.h"
- #include "nsPrintfCString.h"

Differential Revision: https://phabricator.services.mozilla.com/D200529

layout/generic/nsCanvasFrame.cpp

@@ -9,28 +9,26 @@
 #include "nsCanvasFrame.h"
 
 #include "gfxContext.h"
-#include "gfxUtils.h"
-#include "nsContainerFrame.h"
-#include "nsContentCreatorFunctions.h"
-#include "nsCSSRendering.h"
-#include "nsPresContext.h"
-#include "nsGkAtoms.h"
-#include "nsIFrameInlines.h"
-#include "nsDisplayList.h"
-#include "nsCSSFrameConstructor.h"
-#include "nsFrameManager.h"
 #include "gfxPlatform.h"
-#include "nsPrintfCString.h"
-#include "mozilla/AccessibleCaretEventHub.h"
+#include "gfxUtils.h"
 #include "mozilla/BasePrincipal.h"
 #include "mozilla/ComputedStyle.h"
-#include "mozilla/StaticPrefs_browser.h"
-#include "mozilla/StaticPrefs_layout.h"
 #include "mozilla/dom/AnonymousContent.h"
-#include "mozilla/layers/StackingContextHelper.h"
 #include "mozilla/layers/RenderRootStateManager.h"
+#include "mozilla/layers/StackingContextHelper.h"
 #include "mozilla/PresShell.h"
+#include "mozilla/StaticPrefs_browser.h"
+#include "mozilla/StaticPrefs_layout.h"
+#include "nsContainerFrame.h"
+#include "nsContentCreatorFunctions.h"
+#include "nsCSSFrameConstructor.h"
+#include "nsCSSRendering.h"
+#include "nsDisplayList.h"
+#include "nsFrameManager.h"
+#include "nsGkAtoms.h"
+#include "nsIFrameInlines.h"
 #include "nsIScrollableFrame.h"
+#include "nsPresContext.h"
 
 using namespace mozilla;
 using namespace mozilla::dom;