Implement a method to access the non-composited content root layer picture pile.

cc/test/fake_proxy.cc

Index: cc/test/fake_proxy.cc
diff --git a/cc/test/fake_proxy.cc b/cc/test/fake_proxy.cc
index 8b6315a00ea1956bff0705e0f5c367c1c39c7e8e..6befb2c44258b3acd3f95f07e1e21e8d2003cb1a 100644
--- a/cc/test/fake_proxy.cc
+++ b/cc/test/fake_proxy.cc
@@ -4,6 +4,8 @@
 
 #include "cc/test/fake_proxy.h"
 
+#include "cc/picture_pile_impl.h"
+
 namespace cc {
 
 bool FakeProxy::compositeAndReadback(void *pixels, const gfx::Rect&)
@@ -61,4 +63,9 @@ bool FakeProxy::commitPendingForTesting()
     return false;
 }
 
+scoped_refptr<PicturePileImpl> FakeProxy::capturePicturePile()
+{
+    return scoped_refptr<PicturePileImpl>();
+}
+
 }  // namespace cc