Refactor ContentShell to remove ContentViewClient dependency.

content/shell/android/shell_view.h

-// 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.
-
-#ifndef CONTENT_SHELL_ANDROID_SHELL_VIEW_H_
-#define CONTENT_SHELL_ANDROID_SHELL_VIEW_H_
-
-#include <jni.h>
-
-#include "base/basictypes.h"
-#include "base/android/scoped_java_ref.h"
-#include "base/android/jni_helper.h"
-#include "content/public/browser/web_contents.h"
-
-class TabContents;
-
-namespace content {
-
-// Native representation of the java ShellView.  Handles JNI communication
-// between the two instances.
-class ShellView {
- public:
-  ShellView(JNIEnv* env, jobject obj);
-  virtual ~ShellView();
-
-  // Initializes the java components based on the tab contents.
-  void InitFromTabContents(WebContents* tab_contents);
-
-  // Registers the ShellView native methods.
-  static bool Register(JNIEnv* env);
-
- private:
-  JavaObjectWeakGlobalRef weak_java_shell_view_;
-
-  DISALLOW_COPY_AND_ASSIGN(ShellView);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_SHELL_ANDROID_SHELL_VIEW_H_