Add display list fallback reason histograms for 2D canvas

third_party/WebKit/Source/core/frame/ImageBitmap.cpp

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/frame/ImageBitmap.h"
 
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLVideoElement.h"
 #include "core/html/ImageData.h"
 #include "third_party/skia/include/core/SkSurface.h"
@@ skipping 47 matching lines @@
         playerSize = video->webMediaPlayer()->naturalSize();
 
     IntRect videoRect = IntRect(IntPoint(), playerSize);
     IntRect srcRect = intersection(cropRect, videoRect);
     OwnPtr<ImageBuffer> buffer = ImageBuffer::create(cropRect.size(), NonOpaque, DoNotInitializeImagePixels);
     if (!buffer)
         return;
 
     IntPoint dstPoint = IntPoint(std::max(0, -cropRect.x()), std::max(0, -cropRect.y()));
     video->paintCurrentFrame(buffer->canvas(), IntRect(dstPoint, srcRect.size()), nullptr);
-    m_image = StaticBitmapImage::create(buffer->newSkImageSnapshot(PreferNoAcceleration));
+    m_image = StaticBitmapImage::create(buffer->newSkImageSnapshot(PreferNoAcceleration, SnapshotReasonUnknown));
     m_image->setOriginClean(!video->wouldTaintOrigin(document->securityOrigin()));
 }
 
 ImageBitmap::ImageBitmap(HTMLCanvasElement* canvas, const IntRect& cropRect)
 {
     ASSERT(canvas->isPaintable());
     m_image = cropImage(canvas->copiedImage(BackBuffer, PreferAcceleration).get(), cropRect);
     m_image->setOriginClean(canvas->originClean());
 }
 
 ImageBitmap::ImageBitmap(ImageData* data, const IntRect& cropRect)
 {
     IntRect srcRect = intersection(cropRect, IntRect(IntPoint(), data->size()));
 
     OwnPtr<ImageBuffer> buffer = ImageBuffer::create(cropRect.size(), NonOpaque, DoNotInitializeImagePixels);
     if (!buffer)
         return;
 
     if (srcRect.isEmpty()) {
-        m_image = StaticBitmapImage::create(buffer->newSkImageSnapshot(PreferNoAcceleration));
+        m_image = StaticBitmapImage::create(buffer->newSkImageSnapshot(PreferNoAcceleration, SnapshotReasonUnknown));
         return;
     }
 
     IntPoint dstPoint = IntPoint(std::min(0, -cropRect.x()), std::min(0, -cropRect.y()));
     if (cropRect.x() < 0)
         dstPoint.setX(-cropRect.x());
     if (cropRect.y() < 0)
         dstPoint.setY(-cropRect.y());
     buffer->putByteArray(Unmultiplied, data->data()->data(), data->size(), srcRect, dstPoint);
-    m_image = StaticBitmapImage::create(buffer->newSkImageSnapshot(PreferNoAcceleration));
+    m_image = StaticBitmapImage::create(buffer->newSkImageSnapshot(PreferNoAcceleration, SnapshotReasonUnknown));
 }
 
 ImageBitmap::ImageBitmap(ImageBitmap* bitmap, const IntRect& cropRect)
 {
     m_image = cropImage(bitmap->bitmapImage(), cropRect);
     m_image->setOriginClean(bitmap->originClean());
 }
 
 ImageBitmap::ImageBitmap(PassRefPtr<StaticBitmapImage> image, const IntRect& cropRect)
 {
@@ skipping 88 matching lines @@
         exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
         return ScriptPromise();
     }
     return ImageBitmapSource::fulfillImageBitmap(scriptState, create(this, IntRect(sx, sy, sw, sh)));
 }
 
 void ImageBitmap::notifyImageSourceChanged()
 {
 }
 
-PassRefPtr<Image> ImageBitmap::getSourceImageForCanvas(SourceImageStatus* status, AccelerationHint) const
+PassRefPtr<Image> ImageBitmap::getSourceImageForCanvas(SourceImageStatus* status, AccelerationHint, SnapshotReason) const
 {
     *status = NormalSourceImageStatus;
     return m_image ? m_image : nullptr;
 }
 
 void ImageBitmap::adjustDrawRects(FloatRect* srcRect, FloatRect* dstRect) const
 {
 }
 
 FloatSize ImageBitmap::elementSize() const
 {
     return FloatSize(width(), height());
 }
 
 DEFINE_TRACE(ImageBitmap)
 {
     ImageLoaderClient::trace(visitor);
 }
 
 } // namespace blink