Plumb CompositedDisplayList to WebViewImpl

Source/core/layout/LayoutTestHelper.cpp

Index: Source/core/layout/LayoutTestHelper.cpp
diff --git a/Source/core/layout/LayoutTestHelper.cpp b/Source/core/layout/LayoutTestHelper.cpp
index 8a10aeb27ee8ae1fc6dec2ec082297a01cda6948..438e998efb662b8a91575403dbf3260fea7a4be1 100644
--- a/Source/core/layout/LayoutTestHelper.cpp
+++ b/Source/core/layout/LayoutTestHelper.cpp
@@ -8,6 +8,7 @@
 #include "core/loader/EmptyClients.h"
 #include "platform/graphics/GraphicsLayer.h"
 #include "platform/graphics/GraphicsLayerFactory.h"
+#include "public/platform/WebCompositedDisplayList.h"
 
 namespace blink {
 
@@ -28,6 +29,19 @@ public:
         static FakeGraphicsLayerFactory* factory = adoptPtr(new FakeGraphicsLayerFactory).leakPtr();
         return factory;
     }
+
+    void setCompositedDisplayList(PassOwnPtr<WebCompositedDisplayList> compositedDisplayList) override
+    {
+        m_compositedDisplayList = compositedDisplayList;
+    }
+
+    WebCompositedDisplayList* compositedDisplayListForTesting() override
+    {
+        return m_compositedDisplayList.get();
+    }
+
+private:
+    OwnPtr<WebCompositedDisplayList> m_compositedDisplayList;
 };
 
 void RenderingTest::SetUp()