Implement the Platform::sharedOffscreenGraphicsContext3D method.

webkit/compositor_bindings/web_layer_tree_view_impl_for_testing.h

Index: webkit/compositor_bindings/web_layer_tree_view_impl_for_testing.h
diff --git a/webkit/compositor_bindings/web_layer_tree_view_impl_for_testing.h b/webkit/compositor_bindings/web_layer_tree_view_impl_for_testing.h
index 135dcbca0a3b5e5084860e9509330af30b6f0829..c66e1f1511762c5bfa4225a37d62f9e693eb614b 100644
--- a/webkit/compositor_bindings/web_layer_tree_view_impl_for_testing.h
+++ b/webkit/compositor_bindings/web_layer_tree_view_impl_for_testing.h
@@ -15,6 +15,12 @@ class LayerTreeHost;
 class Thread;
 }
 
+namespace webkit {
+namespace gpu {
+class TestContextProviderFactory;
+}
+}
+
 namespace WebKit {
 class WebLayer;
 class WebLayerTreeViewClient;
@@ -86,10 +92,7 @@ class WebLayerTreeViewImplForTesting : public WebKit::WebLayerTreeView,
   WebKit::WebLayerTreeViewClient* client_;
   scoped_ptr<cc::LayerTreeHost> layer_tree_host_;
 
-  class MainThreadContextProvider;
-  scoped_refptr<MainThreadContextProvider> contexts_main_thread_;
-  class CompositorThreadContextProvider;
-  scoped_refptr<CompositorThreadContextProvider> contexts_compositor_thread_;
+  webkit::gpu::TestContextProviderFactory* context_provider_factory_;
 };
 
 }  // namespace Web_kit