Improve speed of 2D canvas hibernation unit tests

third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h

Index: third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
diff --git a/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h b/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
index fc94bdce70c3594061c505ef9cf0e4ef2eddb425..6e095af319fceee7c5a9873af799c8c86bf6c152 100644
--- a/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
+++ b/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
@@ -120,6 +120,7 @@ public:
     void prepareSurfaceForPaintingIfNeeded();
     bool isHidden() { return m_isHidden; }
     OpacityMode opacityMode() { return m_opacityMode; }
+    void dontUseIdleSchedulingForTesting() { m_dontUseIdleSchedulingForTesting = true; }
 
     void beginDestruction();
     void hibernate();
@@ -259,6 +260,7 @@ private:
     bool m_softwareRenderingWhileHidden;
     bool m_surfaceCreationFailedAtLeastOnce = false;
     bool m_hibernationScheduled = false;
+    bool m_dontUseIdleSchedulingForTesting = false;
 
     friend class Canvas2DLayerBridgeTest;
     friend class CanvasRenderingContext2DTest;