Merge 182798 "Adding blink side flag that allows disabling YUV d..."

> Adding blink side flag that allows disabling YUV decoding
> 
> BUG=
> 
> Review URL: https://codereview.chromium.org/609923003

BUG=413001

[email protected]

Review URL: https://codereview.chromium.org/628213002

git-svn-id: svn://svn.chromium.org/blink/branches/chromium/2171@183270 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Author: sugoi1

Source/platform/RuntimeEnabledFeatures.in

@@ -50,6 +50,7 @@ CSS3TextDecorations status=experimental
 CompositedSelectionUpdate
 CustomSchemeHandler depends_on=NavigatorContentUtils, status=experimental
 Database status=stable
+DecodeToYUV status=experimental
 DeviceLight status=experimental
 DisplayList2dCanvas
 SVGFontsOnNonGDIPlatforms

Source/platform/graphics/DecodingImageGenerator.cpp

@@ -29,6 +29,7 @@
 #include "SkData.h"
 #include "SkImageInfo.h"
 #include "platform/PlatformInstrumentation.h"
+#include "platform/RuntimeEnabledFeatures.h"
 #include "platform/SharedBuffer.h"
 #include "platform/TraceEvent.h"
 #include "platform/graphics/ImageFrameGenerator.h"
@@ -85,9 +86,11 @@ bool DecodingImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels,
 
 bool DecodingImageGenerator::onGetYUV8Planes(SkISize sizes[3], void* planes[3], size_t rowBytes[3], SkYUVColorSpace* colorSpace)
 {
-    if (!planes || !planes[0]) {
+    if (!RuntimeEnabledFeatures::decodeToYUVEnabled())
+        return false;
+
+    if (!planes || !planes[0])
         return m_frameGenerator->getYUVComponentSizes(sizes);
-    }
 
     TRACE_EVENT0("blink", "DecodingImageGenerator::onGetYUV8Planes");
     PlatformInstrumentation::willDecodeLazyPixelRef(m_generationId);

Source/web/WebRuntimeFeatures.cpp

@@ -75,6 +75,11 @@ void WebRuntimeFeatures::enableDatabase(bool enable)
     RuntimeEnabledFeatures::setDatabaseEnabled(enable);
 }
 
+void WebRuntimeFeatures::enableDecodeToYUV(bool enable)
+{
+    RuntimeEnabledFeatures::setDecodeToYUVEnabled(enable);
+}
+
 void WebRuntimeFeatures::enableDisplayList2dCanvas(bool enable)
 {
     RuntimeEnabledFeatures::setDisplayList2dCanvasEnabled(enable);

public/web/WebRuntimeFeatures.h

@@ -49,6 +49,8 @@ class WebRuntimeFeatures {
     BLINK_EXPORT static void enableCompositedSelectionUpdate(bool);
     BLINK_EXPORT static bool isCompositedSelectionUpdateEnabled();
 
+    BLINK_EXPORT static void enableDecodeToYUV(bool);
+
     BLINK_EXPORT static void enableDisplayList2dCanvas(bool);
 
     BLINK_EXPORT static void enableEncryptedMedia(bool);