Extract minimal RenderViewHost interface for embedders, leaving

chrome/browser/ui/cocoa/extensions/extension_view_mac.mm

 // Copyright (c) 2012 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.
 
 #import <Cocoa/Cocoa.h>
 
 #include "chrome/browser/ui/cocoa/extensions/extension_view_mac.h"
 
 #include "chrome/browser/extensions/extension_host.h"
 #include "content/browser/renderer_host/render_view_host.h"
@@ skipping 30 matching lines @@
 
 RenderViewHost* ExtensionViewMac::render_view_host() const {
   return extension_host_->render_view_host();
 }
 
 void ExtensionViewMac::DidStopLoading() {
   ShowIfCompletelyLoaded();
 }
 
 void ExtensionViewMac::SetBackground(const SkBitmap& background) {
-  if (!pending_background_.empty() && render_view_host()->view()) {
-    render_view_host()->view()->SetBackground(background);
+  if (!pending_background_.empty() && render_view_host()->GetView()) {
+    render_view_host()->GetView()->SetBackground(background);
   } else {
     pending_background_ = background;
   }
   ShowIfCompletelyLoaded();
 }
 
 void ExtensionViewMac::UpdatePreferredSize(const gfx::Size& new_size) {
   if (container_)
     container_->OnExtensionPreferredSizeChanged(this, new_size);
 }
 
 void ExtensionViewMac::RenderViewCreated() {
   // Do not allow webkit to draw scroll bars on views smaller than
   // the largest size view allowed.  The view will be resized to make
   // scroll bars unnecessary.  Scroll bars change the height of the
   // view, so not drawing them is necessary to avoid infinite resizing.
   gfx::Size largest_popup_size(
       CGSizeMake(ExtensionViewMac::kMaxWidth, ExtensionViewMac::kMaxHeight));
   extension_host_->DisableScrollbarsForSmallWindows(largest_popup_size);
 
-  if (!pending_background_.empty() && render_view_host()->view()) {
-    render_view_host()->view()->SetBackground(pending_background_);
+  if (!pending_background_.empty() && render_view_host()->GetView()) {
+    render_view_host()->GetView()->SetBackground(pending_background_);
     pending_background_.reset();
   }
 }
 
 void ExtensionViewMac::WindowFrameChanged() {
-  if (render_view_host()->view())
-    render_view_host()->view()->WindowFrameChanged();
+  if (render_view_host()->GetView())
+    render_view_host()->GetView()->WindowFrameChanged();
 }
 
 void ExtensionViewMac::CreateWidgetHostView() {
   extension_host_->CreateRenderViewSoon();
 }
 
 void ExtensionViewMac::ShowIfCompletelyLoaded() {
   // We wait to show the ExtensionView until it has loaded, and the view has
   // actually been created. These can happen in different orders.
   if (extension_host_->did_stop_loading()) {
     [native_view() setHidden:NO];
     if (container_)
       container_->OnExtensionViewDidShow(this);
   }
 }