Add a bare-bones extension shelf that displays extension items on OS X.

chrome/browser/renderer_host/render_widget_host_view_mac.mm

 // Copyright (c) 2006-2008 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/renderer_host/render_widget_host_view_mac.h"
 
 #include "base/histogram.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/browser_trial.h"
 #import "chrome/browser/cocoa/rwhvm_editcommand_helper.h"
 #include "chrome/browser/renderer_host/backing_store.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/browser/spellchecker_platform_engine.h"
 #include "chrome/common/native_web_keyboard_event.h"
+#include "chrome/common/render_messages.h"
 #include "skia/ext/platform_canvas.h"
 #include "webkit/api/public/mac/WebInputEventFactory.h"
 #include "webkit/api/public/WebInputEvent.h"
 #include "webkit/glue/webmenurunner_mac.h"
 
 using WebKit::WebInputEventFactory;
 using WebKit::WebMouseEvent;
 using WebKit::WebMouseWheelEvent;
 
 @interface RenderWidgetHostViewCocoa (Private)
@@ skipping 22 matching lines @@
 
 RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget)
     : render_widget_host_(widget),
       about_to_validate_and_paint_(false),
       im_attributes_(nil),
       im_composing_(false),
       is_loading_(false),
       is_hidden_(false),
       shutdown_factory_(this),
       parent_view_(NULL) {
+  // |cocoa_view_| owns us and we will be deleted when |cocoa_view_| goes away.
+  // Since we autorelease it, our caller must put |native_view()| into the view
+  // hierarchy right after calling us.
   cocoa_view_ = [[[RenderWidgetHostViewCocoa alloc]
                   initWithRenderWidgetHostViewMac:this] autorelease];
   render_widget_host_->set_view(this);
 }
 
 RenderWidgetHostViewMac::~RenderWidgetHostViewMac() {
   [im_attributes_ release];
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ skipping 343 matching lines @@
 
   NSRect bounds = [[cocoa_view_ window] frame];
   return NSRectToRect(bounds, [[cocoa_view_ window] screen]);
 }
 
 void RenderWidgetHostViewMac::SetActive(bool active) {
   if (render_widget_host_)
     render_widget_host_->SetActive(active);
 }
 
+void RenderWidgetHostViewMac::SetBackground(const SkBitmap& background) {
+  RenderWidgetHostView::SetBackground(background);
+  if (render_widget_host_)
+    render_widget_host_->Send(new ViewMsg_SetBackground(
+        render_widget_host_->routing_id(), background));
+}
 
 // RenderWidgetHostViewCocoa ---------------------------------------------------
 
 @implementation RenderWidgetHostViewCocoa
 
 // Tons of stuff goes here, where we grab events going on in Cocoaland and send
 // them into the C++ system. TODO(avi): all that jazz
 
 - (id)initWithRenderWidgetHostViewMac:(RenderWidgetHostViewMac*)r {
   self = [super initWithFrame:NSZeroRect];
@@ skipping 715 matching lines @@
     renderWidgetHostView_->render_widget_host_->ForwardKeyboardEvent(event);
   } else {
     renderWidgetHostView_->render_widget_host_->ImeConfirmComposition(
         UTF8ToUTF16([im_text UTF8String]));
   }
   renderWidgetHostView_->im_composing_ = false;
 }
 
 @end