Make panel adjust bounds per preferred size change notification on Windows.

content/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2011 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 "content/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
@@ skipping 984 matching lines @@
                                   WindowOpenDisposition disposition) {
   GURL validated_url(url);
   FilterURL(ChildProcessSecurityPolicy::GetInstance(),
             process()->id(), &validated_url);
 
   delegate_->RequestOpenURL(validated_url, referrer, disposition);
 }
 
 void RenderViewHost::OnMsgDidContentsPreferredSizeChange(
     const gfx::Size& new_size) {
-  RenderViewHostDelegate::View* view = delegate_->GetViewDelegate();
-  if (!view)
-    return;
-  view->UpdatePreferredSize(new_size);
+  delegate_->UpdatePreferredSize(new_size);
 }
 
 void RenderViewHost::OnMsgDidChangeScrollbarsForMainFrame(
     bool has_horizontal_scrollbar, bool has_vertical_scrollbar) {
   if (view())
     view()->SetHasHorizontalScrollbar(has_horizontal_scrollbar);
 }
 
 void RenderViewHost::OnMsgDidChangeScrollOffsetPinningForMainFrame(
     bool is_pinned_to_left, bool is_pinned_to_right) {
@@ skipping 343 matching lines @@
                         params.right_aligned);
   }
 }
 #endif
 
 void RenderViewHost::OnRunFileChooser(
     const ViewHostMsg_RunFileChooser_Params& params) {
   delegate_->RunFileChooser(this, params);
 }