Fixing Canvas2DLayerBridge to handle lost graphics contexts

Source/WebKit/chromium/tests/Canvas2DLayerManagerTest.cpp

Index: Source/WebKit/chromium/tests/Canvas2DLayerManagerTest.cpp
diff --git a/Source/WebKit/chromium/tests/Canvas2DLayerManagerTest.cpp b/Source/WebKit/chromium/tests/Canvas2DLayerManagerTest.cpp
index a5b2c71ef12e94369dbac82b7d87a985470f2c3e..e64a9ec46d11977b0c9c9700c722898eda3750c3 100644
--- a/Source/WebKit/chromium/tests/Canvas2DLayerManagerTest.cpp
+++ b/Source/WebKit/chromium/tests/Canvas2DLayerManagerTest.cpp
@@ -43,11 +43,12 @@ using testing::Test;
 class FakeCanvas2DLayerBridge : public Canvas2DLayerBridge {
 public:
     FakeCanvas2DLayerBridge(PassRefPtr<GraphicsContext3D> context, SkDeferredCanvas* canvas)
-        : Canvas2DLayerBridge(context, canvas, NonOpaque, SingleThread)
+        : Canvas2DLayerBridge(context, canvas)
         , m_freeableBytes(0)
         , m_freeMemoryIfPossibleCount(0)
         , m_flushCount(0)
     {
+        init(NonOpaque, SingleThread);
     }
 
     virtual size_t storageAllocatedForRecording() OVERRIDE
@@ -81,6 +82,10 @@ public:
         m_flushCount++;
     }
 
+    virtual bool isValid() OVERRIDE
+    {
+        return true;
+    }
 public:
     size_t m_freeableBytes;
     int m_freeMemoryIfPossibleCount;