[PPAPI] Add browser tests for compositor API

ppapi/proxy/compositor_resource.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_PROXY_COMPOSITOR_RESOURCE_H_
 #define PPAPI_PROXY_COMPOSITOR_RESOURCE_H_
 
 #include <map>
 
 #include "ppapi/proxy/compositor_layer_resource.h"
 #include "ppapi/proxy/plugin_resource.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
+#include "ppapi/shared_impl/proxy_lock.h"
 #include "ppapi/thunk/ppb_compositor_api.h"
 
 namespace ppapi {
 namespace proxy {
 
 class PPAPI_PROXY_EXPORT CompositorResource
     : public PluginResource,
       public thunk::PPB_Compositor_API {
  public:
   CompositorResource(Connection connection,
                      PP_Instance instance);
 
-  bool IsInProgress() const {
-    return TrackedCallback::IsPending(commit_callback_);
-  }
+  bool IsInProgress() const;
 
-  int32_t GenerateResourceId() const {
-    return ++last_resource_id_;
-  }
+  int32_t GenerateResourceId() const;
 
  private:
   virtual ~CompositorResource();
 
   // Resource overrides:
   virtual thunk::PPB_Compositor_API* AsPPB_Compositor_API() OVERRIDE;
 
   // PluginResource overrides:
+  virtual void NotifyLastPluginRefWasDeleted() OVERRIDE;
   virtual void OnReplyReceived(const ResourceMessageReplyParams& params,
                                const IPC::Message& msg) OVERRIDE;
 
   // thunk::PPB_Compositor_API overrides:
   virtual PP_Resource AddLayer() OVERRIDE;
   virtual int32_t CommitLayers(
       const scoped_refptr<TrackedCallback>& callback) OVERRIDE;
   virtual int32_t ResetLayers() OVERRIDE;
 
   // IPC msg handlers:
@@ skipping 24 matching lines @@
   // The last resource id for texture or image.
   mutable int32_t last_resource_id_;
 
   DISALLOW_COPY_AND_ASSIGN(CompositorResource);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
 #endif  // PPAPI_PROXY_COMPOSITOR_RESOURCE_H_