Improve metrics for display list canvas fallback reason

third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. 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
@@ skipping 190 matching lines @@
 void ImageBuffer::didDraw(const FloatRect& rect) const {
   if (m_snapshotState == DidAcquireSnapshot)
     m_snapshotState = DrawnToAfterSnapshot;
   m_surface->didDraw(rect);
 }
 
 WebLayer* ImageBuffer::platformLayer() const {
   return m_surface->layer();
 }
 
-bool ImageBuffer::copyToPlatformTexture(gpu::gles2::GLES2Interface* gl,
+bool ImageBuffer::copyToPlatformTexture(SnapshotReason reason,
+                                        gpu::gles2::GLES2Interface* gl,
                                         GLuint texture,
                                         GLenum internalFormat,
                                         GLenum destType,
                                         GLint level,
                                         bool premultiplyAlpha,
                                         bool flipY,
                                         const IntPoint& destPoint,
                                         const IntRect& sourceSubRectangle) {
   if (!Extensions3DUtil::canUseCopyTextureCHROMIUM(
           GL_TEXTURE_2D, internalFormat, destType, level))
     return false;
 
   if (!isSurfaceValid())
     return false;
 
-  sk_sp<const SkImage> textureImage = m_surface->newImageSnapshot(
-      PreferAcceleration, SnapshotReasonCopyToWebGLTexture);
+  sk_sp<const SkImage> textureImage =
+      m_surface->newImageSnapshot(PreferAcceleration, reason);
   if (!textureImage)
     return false;
 
   if (!m_surface->isAccelerated())
     return false;
 
   DCHECK(textureImage->isTextureBacked());  // The isAccelerated() check above
                                             // should guarantee this.
   // Get the texture ID, flushing pending operations if needed.
   const GrGLTextureInfo* textureInfo = skia::GrBackendObjectToGrGLTextureInfo(
@@ skipping 323 matching lines @@
   ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
   Vector<unsigned char> result;
   if (!encodeImage(mimeType, quality, &result))
     return "data:,";
 
   return "data:" + mimeType + ";base64," + base64Encode(result);
 }
 
 }  // namespace blink