getImageData now finalizesFrame and disableAcceleration updates composit

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

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index fbdd862aa8295608cc0654fd508e8a3889a1420e..488de205111ea77ac6f7714a6ede30a740ba9e63 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -351,6 +351,7 @@ void HTMLCanvasElement::DidDisableAcceleration() {
   // We must force a paint invalidation on the canvas even if it's
   // content did not change because it layer was destroyed.
   DidDraw();
+  SetNeedsCompositingUpdate();
 }
 
 void HTMLCanvasElement::RestoreCanvasMatrixClipStack(