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

extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h

Index: extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h
diff --git a/extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h b/extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h
index 2fca1fbdec9d66366493973594dba9e122814df4..11d4a1c2f27ae0099d5c4104af01e6a4df19b7b3 100644
--- a/extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h
+++ b/extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.h
@@ -11,6 +11,7 @@
 #include "extensions/renderer/scoped_persistent.h"
 #include "third_party/WebKit/public/platform/WebURLLoader.h"
 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
+#include "ui/gfx/geometry/size.h"
 #include "url/gurl.h"
 #include "v8/include/v8.h"
 
@@ -44,6 +45,8 @@ class MimeHandlerViewContainer : public GuestViewContainer,
   void Ready() override;
   void DidFinishLoading() override;
   void DidReceiveData(const char* data, int data_length) override;
+  void OnElementResize(const gfx::Size& old_size,
+                       const gfx::Size& new_size) override;
   bool OnMessageReceived(const IPC::Message& message) override;
   v8::Local<v8::Object> V8ScriptableObject(v8::Isolate*) override;
 
@@ -100,6 +103,9 @@ class MimeHandlerViewContainer : public GuestViewContainer,
   // has been called.
   bool guest_loaded_;
 
+  // The size of the element.
+  gfx::Size element_size_;
+
   base::WeakPtrFactory<MimeHandlerViewContainer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MimeHandlerViewContainer);