mac: Add support for asynchronous dictionary lookup

content/browser/renderer_host/text_input_client_message_filter.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_BROWSER_RENDERER_HOST_TEXT_INPUT_CLIENT_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_CLIENT_MESSAGE_FILTER_H_
 
 #include "content/common/mac/attributed_string_coder.h"
 #include "content/public/browser/browser_message_filter.h"
 
 namespace gfx {
+class Point;
 class Range;
 class Rect;
 }
 
 namespace content {
 
 // This is a browser-side message filter that lives on the IO thread to handle
 // replies to messages sent by the TextInputClientMac. See
 // content/browser/renderer_host/text_input_client_mac.h for more information.
 class CONTENT_EXPORT TextInputClientMessageFilter
     : public BrowserMessageFilter {
  public:
   explicit TextInputClientMessageFilter(int child_id);
 
   // BrowserMessageFilter override:
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok) OVERRIDE;
 
  protected:
   virtual ~TextInputClientMessageFilter();
 
  private:
   // IPC Message handlers:
+  void OnGotStringAtPoint(
+      const mac::AttributedStringCoder::EncodedString& encoded_string,
+      const gfx::Point& point);
   void OnGotCharacterIndexForPoint(size_t index);
   void OnGotFirstRectForRange(const gfx::Rect& rect);
   void OnGotStringFromRange(
       const mac::AttributedStringCoder::EncodedString& string);
 
   // Child process id.
   int child_process_id_;
 
   DISALLOW_COPY_AND_ASSIGN(TextInputClientMessageFilter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_CLIENT_MESSAGE_FILTER_H_