Use different client interface for WebLayerTreeViewForTesting to decouple from WebLayerTreeViewClie…

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 2b360bc2312dd8b88e02e0e3a09c726399cc21e2..5adc67018a71ddc8b27f154d4c4552cd98204555 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
@@ -9,6 +9,7 @@
 #include "cc/layer_tree_host_client.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebLayerTreeView.h"
 #include "webkit/compositor_bindings/webkit_compositor_bindings_export.h"
+#include "webkit/support/webkit_support.h"
 
 namespace cc {
 class LayerTreeHost;
@@ -30,6 +31,9 @@ class WebLayerTreeViewImplForTesting : public WebKit::WebLayerTreeView,
   };
   WEBKIT_COMPOSITOR_BINDINGS_EXPORT WebLayerTreeViewImplForTesting(
       RenderingType type,
+      webkit_support::DRTLayerTreeViewClient* client);
+  WEBKIT_COMPOSITOR_BINDINGS_EXPORT WebLayerTreeViewImplForTesting(
+      RenderingType type,
       WebKit::WebLayerTreeViewClient* client);
   virtual ~WebLayerTreeViewImplForTesting();
 
@@ -89,6 +93,7 @@ class WebLayerTreeViewImplForTesting : public WebKit::WebLayerTreeView,
 
  private:
   RenderingType type_;
+  webkit_support::DRTLayerTreeViewClient* drt_client_;
   WebKit::WebLayerTreeViewClient* client_;
   scoped_ptr<cc::LayerTreeHost> layer_tree_host_;