Improve metrics for display list canvas fallback reason

third_party/WebKit/Source/platform/graphics/GraphicsTypes.h

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 70 matching lines @@
   PreferAcceleration,
   // The PreferAccelerationAfterVisibilityChange hint suggests we should switch
   // back to acceleration in the context of the canvas becoming visible again.
   PreferAccelerationAfterVisibilityChange,
   PreferNoAcceleration,
 };
 
 enum SnapshotReason {
   SnapshotReasonUnknown,
   SnapshotReasonGetImageData,
-  SnapshotReasonCopyToWebGLTexture,
+  SnapshotReasonWebGLTexImage2D,
+  SnapshotReasonWebGLTexSubImage2D,
+  SnapshotReasonWebGLTexImage3D,
+  SnapshotReasonWebGLTexSubImage3D,
   SnapshotReasonPaint,
   SnapshotReasonToDataURL,
   SnapshotReasonToBlob,
   SnapshotReasonCanvasListenerCapture,
   SnapshotReasonDrawImage,
   SnapshotReasonCreatePattern,
   SnapshotReasonTransferToImageBitmap,
   SnapshotReasonUnitTests,
   SnapshotReasonGetCopiedImage,
   SnapshotReasonWebGLDrawImageIntoBuffer,
+  SnapshotReasonCopyToClipboard,
+  SnapshotReasonCreateImageBitmap,
 };
 
 // Note: enum used directly for histogram, values must not change
 enum DisableDeferralReason {
   DisableDeferralReasonUnknown =
       0,  // Should not appear in production histograms
   DisableDeferralReasonExpensiveOverdrawHeuristic = 1,
   DisableDeferralReasonUsingTextureBackedPattern = 2,
   DisableDeferralReasonDrawImageOfVideo = 3,
   DisableDeferralReasonDrawImageOfAnimated2dCanvas = 4,
@@ skipping 87 matching lines @@
 
 PLATFORM_EXPORT String textAlignName(TextAlign);
 PLATFORM_EXPORT bool parseTextAlign(const String&, TextAlign&);
 
 PLATFORM_EXPORT String textBaselineName(TextBaseline);
 PLATFORM_EXPORT bool parseTextBaseline(const String&, TextBaseline&);
 
 }  // namespace blink
 
 #endif