Make 2D canvas disable gpu acceleration when getImageData is called

third_party/WebKit/Source/platform/graphics/Canvas2DImageBufferSurface.h

Index: third_party/WebKit/Source/platform/graphics/Canvas2DImageBufferSurface.h
diff --git a/third_party/WebKit/Source/platform/graphics/Canvas2DImageBufferSurface.h b/third_party/WebKit/Source/platform/graphics/Canvas2DImageBufferSurface.h
index 813a9484c3af7d43b2078e641c957919d8f2674e..dfffd7eea448618230d83221f364be35cb336182 100644
--- a/third_party/WebKit/Source/platform/graphics/Canvas2DImageBufferSurface.h
+++ b/third_party/WebKit/Source/platform/graphics/Canvas2DImageBufferSurface.h
@@ -43,6 +43,18 @@ public:
         : ImageBufferSurface(size, opacityMode)
         , m_layerBridge(Canvas2DLayerBridge::create(size, msaaSampleCount, opacityMode, accelerationMode))
     {
+        init();
+    }
+
+    Canvas2DImageBufferSurface(PassRefPtr<Canvas2DLayerBridge> bridge, const IntSize& size, OpacityMode opacityMode)
+        : ImageBufferSurface(size, opacityMode)
+        , m_layerBridge(std::move(bridge))
+    {
+        init();
+    }
+
+    void init()
+    {
         clear();
         if (isValid())
             m_layerBridge->flush();