3D Compositing in <browser>, first draft.

content/renderer/browser_plugin/browser_plugin.h

Index: content/renderer/browser_plugin/browser_plugin.h
diff --git a/content/renderer/browser_plugin/browser_plugin.h b/content/renderer/browser_plugin/browser_plugin.h
index 82fbd1c45a845d4f63e3a4ec783465cb78d99c4c..10e278068907f73d4bcb16866d80f7fb066f6049 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin.h
@@ -14,6 +14,7 @@
 #include "content/renderer/render_view_impl.h"
 
 struct BrowserPluginMsg_UpdateRect_Params;
+struct BrowserPlugin_SwapInfo;
 
 namespace content {
 namespace browser_plugin {
@@ -28,8 +29,13 @@ class BrowserPlugin : public WebKit::WebPlugin {
   void GuestCrashed();
   void UpdateURL(const GURL& url);
   void AdvanceFocus(bool reverse);
+  void BuffersSwapped(uint64 surface_handle, const BrowserPlugin_SwapInfo& info);
   void PostMessage(const std::string& message,
                    const std::string& target_origin);
+
+  void WillInitiatePaint();
+  void PerformBuffersSwappedACK(const BrowserPlugin_SwapInfo& info);
+
   // WebKit::WebPlugin implementation.
   virtual WebKit::WebPluginContainer* container() const OVERRIDE;
   virtual bool initialize(WebKit::WebPluginContainer* container) OVERRIDE;
@@ -93,6 +99,7 @@ class BrowserPlugin : public WebKit::WebPlugin {
   bool guest_crashed_;
   long long parent_frame_;
   std::string src_;
+  std::vector< base::Callback<void(void)> > compositing_callbacks_;
   DISALLOW_COPY_AND_ASSIGN(BrowserPlugin);
 };