Added the infrastructure for surfaceProxy.onResize() and SurfaceView.onResize()

content/public/renderer/browser_plugin_delegate.h

Index: content/public/renderer/browser_plugin_delegate.h
diff --git a/content/public/renderer/browser_plugin_delegate.h b/content/public/renderer/browser_plugin_delegate.h
index 5485a7de5bc84a785d188b7b0550909473d5432a..2925d366f2a26a93c41fde135d28d3afe981d44b 100644
--- a/content/public/renderer/browser_plugin_delegate.h
+++ b/content/public/renderer/browser_plugin_delegate.h
@@ -10,6 +10,10 @@
 #include "content/common/content_export.h"
 #include "ipc/ipc_message.h"
 
+namespace gfx {
+class Size;
+}
+
 namespace v8 {
 class Isolate;
 class Object;
@@ -41,6 +45,10 @@ class CONTENT_EXPORT BrowserPluginDelegate {
   // process.
   virtual void SetElementInstanceID(int element_instance_id) {}
 
+  // Called when the plugin resizes.
+  virtual void OnElementResize(const gfx::Size& old_size,
+                               const gfx::Size& new_size) {}
+
   // Called when a message is received.  Returns true iff the message was
   // handled.
   virtual bool OnMessageReceived(const IPC::Message& message);