Remove WebContents methods that duplicate WebContentsView methods.

chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.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.
 
 #include "chrome/browser/ui/cocoa/extensions/native_app_window_cocoa.h"
 
 #include "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/cocoa/browser_window_utils.h"
@@ skipping 636 matching lines @@
     [NSApp cancelUserAttentionRequest:attention_request_id_];
     attention_request_id_ = 0;
   }
 }
 
 bool NativeAppWindowCocoa::IsAlwaysOnTop() const {
   return false;
 }
 
 void NativeAppWindowCocoa::RenderViewHostChanged() {
-  web_contents()->Focus();
+  web_contents()->GetView()->Focus();
 }
 
 gfx::Insets NativeAppWindowCocoa::GetFrameInsets() const {
   if (!has_frame_)
     return gfx::Insets();
 
   // Flip the coordinates based on the main screen.
   NSInteger screen_height =
       NSHeight([[[NSScreen screens] objectAtIndex:0] frame]);
 
@@ skipping 90 matching lines @@
   CHECK(!window || [window isKindOfClass:[ShellNSWindow class]]);
   return static_cast<ShellNSWindow*>(window);
 }
 
 // static
 NativeAppWindow* NativeAppWindow::Create(
     ShellWindow* shell_window,
     const ShellWindow::CreateParams& params) {
   return new NativeAppWindowCocoa(shell_window, params);
 }