Implement smoother autosizing of the extension options overlay

chrome/browser/guest_view/extension_options/extension_options_guest.cc

 // 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.
 
 #include "chrome/browser/guest_view/extension_options/extension_options_guest.h"
 
 #include "base/values.h"
 #include "chrome/browser/extensions/chrome_extension_web_contents_observer.h"
 #include "chrome/browser/guest_view/extension_options/extension_options_constants.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 126 matching lines @@
 void ExtensionOptionsGuest::OnRequest(
     const ExtensionHostMsg_Request_Params& params) {
   extension_function_dispatcher_->Dispatch(
       params, guest_web_contents()->GetRenderViewHost());
 }
 
 void ExtensionOptionsGuest::GuestSizeChangedDueToAutoSize(
     const gfx::Size& old_size,
     const gfx::Size& new_size) {
   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
-  args->SetInteger(extensionoptions::kWidth, new_size.width());
-  args->SetInteger(extensionoptions::kHeight, new_size.height());
+  args->SetInteger(extensionoptions::kNewWidth, new_size.width());
+  args->SetInteger(extensionoptions::kNewHeight, new_size.height());
+  args->SetInteger(extensionoptions::kOldWidth, old_size.width());
+  args->SetInteger(extensionoptions::kOldHeight, old_size.height());
   DispatchEventToEmbedder(new extensions::GuestViewBase::Event(
       extension_options_internal::OnSizeChanged::kEventName, args.Pass()));
 }
 
 bool ExtensionOptionsGuest::IsAutoSizeSupported() const {
   return true;
 }
 
 void ExtensionOptionsGuest::SetUpAutoSize() {
   // Read the autosize parameters passed in from the embedder.
@@ skipping 11 matching lines @@
   int min_width = 0;
   extra_params()->GetInteger(extensionoptions::kAttributeMinHeight,
                              &min_height);
   extra_params()->GetInteger(extensionoptions::kAttributeMinWidth, &min_width);
 
   // Call SetAutoSize to apply all the appropriate validation and clipping of
   // values.
   SetAutoSize(
       true, gfx::Size(min_width, min_height), gfx::Size(max_width, max_height));
 }