Refactor ContentShell to remove ContentViewClient dependency.

content/shell/android/shell_view.cc

-// 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 "content/shell/android/shell_view.h"
-
-#include "base/android/jni_android.h"
-#include "jni/shell_view_jni.h"
-
-namespace content {
-
-ShellView::ShellView(JNIEnv* env, jobject obj)
-    : weak_java_shell_view_(env, obj) {
-}
-
-ShellView::~ShellView() {
-}
-
-void ShellView::InitFromTabContents(WebContents* tab_contents) {
-  JNIEnv* env = base::android::AttachCurrentThread();
-  Java_ShellView_initFromNativeTabContents(
-      env, weak_java_shell_view_.get(env).obj(),
-      reinterpret_cast<jint>(tab_contents));
-}
-
-// static
-bool ShellView::Register(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-static jint Init(JNIEnv* env, jobject obj) {
-  return reinterpret_cast<jint>(new ShellView(env, obj));
-}
-
-}  // namespace content