Convert string16 to base::string16 in content.

content/browser/android/content_view_core_impl.h

 // Copyright 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_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 #define CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_
 
 #include <vector>
 
 #include "base/android/jni_android.h"
@@ skipping 240 matching lines @@
                        const gfx::SizeF& viewport_size,
                        const gfx::Vector2dF& controls_offset,
                        const gfx::Vector2dF& content_offset,
                        float overdraw_bottom_height);
 
   void UpdateImeAdapter(int native_ime_adapter, int text_input_type,
                         const std::string& text,
                         int selection_start, int selection_end,
                         int composition_start, int composition_end,
                         bool show_ime_if_needed, bool require_ack);
-  void SetTitle(const string16& title);
+  void SetTitle(const base::string16& title);
   void OnBackgroundColorChanged(SkColor color);
 
   bool HasFocus();
   void ConfirmTouchEvent(InputEventAckState ack_result);
   void UnhandledFlingStartEvent();
   void OnScrollUpdateGestureConsumed();
   void HasTouchEventHandlers(bool need_touch_events);
   void OnSelectionChanged(const std::string& text);
   void OnSelectionBoundsChanged(
       const ViewHostMsg_SelectionBounds_Params& params);
@@ skipping 112 matching lines @@
   int device_orientation_;
 
   DISALLOW_COPY_AND_ASSIGN(ContentViewCoreImpl);
 };
 
 bool RegisterContentViewCore(JNIEnv* env);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_CONTENT_VIEW_CORE_IMPL_H_