Use a direct include of strings headers in chrome/browser/a*-c*/.

chrome/browser/android/tab_android.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 CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 #define CHROME_BROWSER_ANDROID_TAB_ANDROID_H_
 
 #include <jni.h>
 
 #include "base/android/jni_helper.h"
 #include "base/callback_forward.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "chrome/browser/sessions/session_id.h"
 #include "chrome/browser/ui/toolbar/toolbar_model.h"
 
 class GURL;
 class SkBitmap;
 
 namespace browser_sync {
 class SyncedTabDelegate;
 }
 
@@ skipping 67 matching lines @@
   content::WebContents* InitWebContentsFromView(JNIEnv* env,
                                                 jobject content_view);
 
   SessionID tab_id_;
 
  private:
   JavaObjectWeakGlobalRef weak_java_tab_;
 };
 
 #endif  // CHROME_BROWSER_ANDROID_TAB_ANDROID_H_