[PPAPI] Add target param for CompositorLayer::SetTexture().

ppapi/shared_impl/compositor_layer_data.h

 // Copyright 2014 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.
 
 #ifndef PPAPI_SHARED_IMPL_COMPOSITOR_LAYER_DATA_H_
 #define PPAPI_SHARED_IMPL_COMPOSITOR_LAYER_DATA_H_
 
 #include <string.h>
 
 #include "base/logging.h"
@@ skipping 60 matching lines @@
     ImageLayer()
        : resource(0),
          source_rect(PP_MakeFloatRectFromXYWH(0.0f, 0.0f, 0.0f, 0.0f)) {}
 
     PP_Resource resource;
     PP_FloatRect source_rect;
   };
 
   struct TextureLayer {
     TextureLayer()
-       : sync_point(0),
+       : target(0),
+         sync_point(0),
          source_rect(PP_MakeFloatRectFromXYWH(0.0f, 0.0f, 1.0f, 1.0f)),
          premult_alpha(true) {}
 
     gpu::Mailbox mailbox;
+    uint32_t target;
     uint32_t sync_point;
     PP_FloatRect source_rect;
     bool premult_alpha;
   };
 
   CompositorLayerData() {}
 
   CompositorLayerData(const CompositorLayerData& other) {
     *this = other;
   }
@@ skipping 14 matching lines @@
 
   LayerCommon common;
   scoped_ptr<ColorLayer> color;
   scoped_ptr<TextureLayer> texture;
   scoped_ptr<ImageLayer> image;
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_COMPOSITOR_LAYER_DATA_H_