Improve metrics for display list canvas fallback reason

third_party/WebKit/Source/core/html/HTMLImageElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLImageElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
index 01fc2ac62b9849ede2e4d98b0d73447fdedc8672..a55126b93e5214f3c30b6d667b8ffbdd839459bc 100644
--- a/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLImageElement.cpp
@@ -867,8 +867,7 @@ int HTMLImageElement::sourceWidth() {
   SourceImageStatus status;
   FloatSize defaultObjectSize(width(), height());
   RefPtr<Image> image = getSourceImageForCanvas(
-      &status, PreferNoAcceleration, SnapshotReasonCopyToWebGLTexture,
-      defaultObjectSize);
+      &status, PreferNoAcceleration, SnapshotReasonUnknown, defaultObjectSize);
   return image->width();
 }
 
@@ -876,8 +875,7 @@ int HTMLImageElement::sourceHeight() {
   SourceImageStatus status;
   FloatSize defaultObjectSize(width(), height());
   RefPtr<Image> image = getSourceImageForCanvas(
-      &status, PreferNoAcceleration, SnapshotReasonCopyToWebGLTexture,
-      defaultObjectSize);
+      &status, PreferNoAcceleration, SnapshotReasonUnknown, defaultObjectSize);
   return image->height();
 }