Fix performance regression in WebGL to 2D canvas draws.

third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
index f603d1fdf07ffd11519a415438f9903395773640..fa89b61043337bef639bdfac0d77ade1298c2e68 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContextBase.cpp
@@ -649,7 +649,7 @@ ImageBitmap* WebGLRenderingContextBase::transferToImageBitmapBase()
     return ImageBitmap::create(drawingBuffer()->transferToStaticBitmapImage());
 }
 
-PassRefPtr<Image> WebGLRenderingContextBase::getImage(SnapshotReason reason) const
+PassRefPtr<Image> WebGLRenderingContextBase::getImage(AccelerationHint hint, SnapshotReason reason) const
 {
     if (!drawingBuffer())
         return nullptr;
@@ -667,7 +667,7 @@ PassRefPtr<Image> WebGLRenderingContextBase::getImage(SnapshotReason reason) con
         NOTREACHED();
         return nullptr;
     }
-    return buffer->newImageSnapshot(PreferAcceleration, reason);
+    return buffer->newImageSnapshot(hint, reason);
 }
 
 namespace {