Add serialization/deserialization for FakePictureLayer for testing.

cc/test/remote_client_layer_factory.cc

Index: cc/test/remote_client_layer_factory.cc
diff --git a/cc/test/remote_client_layer_factory.cc b/cc/test/remote_client_layer_factory.cc
index 348cbe4c8023ffa4dc9474041765bd785c9c1e1f..cc7fd9f618ed686637822a94d108b4668aef129a 100644
--- a/cc/test/remote_client_layer_factory.cc
+++ b/cc/test/remote_client_layer_factory.cc
@@ -7,6 +7,7 @@
 #include "cc/layers/layer.h"
 #include "cc/layers/picture_layer.h"
 #include "cc/layers/solid_color_scrollbar_layer.h"
+#include "cc/test/fake_picture_layer.h"
 
 namespace cc {
 
@@ -30,6 +31,15 @@ scoped_refptr<PictureLayer> RemoteClientLayerFactory::CreatePictureLayer(
   return layer;
 }
 
+scoped_refptr<PictureLayer> RemoteClientLayerFactory::CreateFakePictureLayer(
+    int engine_layer_id,
+    ContentLayerClient* content_layer_client) {
+  scoped_refptr<PictureLayer> layer =
+      FakePictureLayer::Create(content_layer_client);
+  layer->SetLayerIdForTesting(engine_layer_id);
+  return layer;
+}
+
 scoped_refptr<SolidColorScrollbarLayer>
 RemoteClientLayerFactory::CreateSolidColorScrollbarLayer(
     int engine_layer_id,