Add serialization/deserialization for FakePictureLayer for testing.

cc/layers/layer_proto_converter.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/layer_proto_converter.h"
 
 #include "base/stl_util.h"
 #include "base/trace_event/trace_event.h"
 #include "cc/layers/empty_content_layer_client.h"
 #include "cc/layers/heads_up_display_layer.h"
@@ skipping 81 matching lines @@
     return iter->second;
   DCHECK(proto.has_type());
   switch (proto.type()) {
     // Fall through and build a base layer.  This won't have any special layer
     // properties but still maintains the layer hierarchy if we run into a
     // layer type we don't support.
     case proto::LayerNode::UNKNOWN:
     case proto::LayerNode::LAYER:
       return Layer::Create().get();
     case proto::LayerNode::PICTURE_LAYER:
+    case proto::LayerNode::FAKE_PICTURE_LAYER:
       return PictureLayer::Create(EmptyContentLayerClient::GetInstance());
     case proto::LayerNode::HEADS_UP_DISPLAY_LAYER:
       return HeadsUpDisplayLayer::Create();
     case proto::LayerNode::SOLID_COLOR_SCROLLBAR_LAYER:
       // Create and return a SolidColorScrollbarLayer with invalid properties
       // (orientation, thumb thickness, starting track, left_side_scroll, layer
       // id etc.).
       // These properties will be set correctly in the later step when we run
       // through LayerTreeHost and deserialize them for each layer.
       return SolidColorScrollbarLayer::Create(ScrollbarOrientation::HORIZONTAL,
                                               -1, -1, false, Layer::INVALID_ID);
   }
   // TODO(nyquist): Add the rest of the necessary LayerTypes. This function
   // should not return null.
   NOTREACHED();
   return nullptr;
 }
 
 }  // namespace cc