Convert string16 to base::string16 in content.

content/shell/browser/shell_javascript_dialog_mac.mm

 // Copyright 2013 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/browser/shell_javascript_dialog.h"
 
 #import <Cocoa/Cocoa.h>
 
 #import "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
@@ skipping 48 matching lines @@
   return textField_;
 }
 
 - (void)alertDidEnd:(NSAlert*)alert
          returnCode:(int)returnCode
         contextInfo:(void*)contextInfo {
   if (returnCode == NSRunStoppedResponse)
     return;
 
   bool success = returnCode == NSAlertFirstButtonReturn;
-  string16 input;
+  base::string16 input;
   if (textField_)
     input = base::SysNSStringToUTF16([textField_ stringValue]);
 
   content::ShellJavaScriptDialog* native_dialog =
       reinterpret_cast<content::ShellJavaScriptDialog*>(contextInfo);
   callback_.Run(success, input);
   manager_->DialogClosed(native_dialog);
 }
 
 - (void)cancel {
   [NSApp endSheet:[alert_ window]];
   alert_.reset();
 }
 
 @end
 
 namespace content {
 
 ShellJavaScriptDialog::ShellJavaScriptDialog(
     ShellJavaScriptDialogManager* manager,
     gfx::NativeWindow parent_window,
     JavaScriptMessageType message_type,
-    const string16& message_text,
-    const string16& default_prompt_text,
+    const base::string16& message_text,
+    const base::string16& default_prompt_text,
     const JavaScriptDialogManager::DialogClosedCallback& callback)
     : manager_(manager),
       callback_(callback) {
   bool text_field = message_type == JAVASCRIPT_MESSAGE_TYPE_PROMPT;
   bool one_button = message_type == JAVASCRIPT_MESSAGE_TYPE_ALERT;
 
   helper_ =
       [[ShellJavaScriptDialogHelper alloc] initHelperWithManager:manager
                                                      andCallback:callback];
 
@@ skipping 25 matching lines @@
 
 ShellJavaScriptDialog::~ShellJavaScriptDialog() {
   [helper_ release];
 }
 
 void ShellJavaScriptDialog::Cancel() {
   [helper_ cancel];
 }
 
 }  // namespace content