Implement "Look Up In Dictionary" context menu item asynchronously.

content/browser/renderer_host/text_input_client_mac.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_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_CLIENT_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_block.h"
@@ skipping 48 matching lines @@
       RenderWidgetHost* rwh, NSRange range);
   // Returns NSZeroRect if the request times out or is not completed. The result
   // is in WebKit coordinates.
   NSRect GetFirstRectForRange(RenderWidgetHost* rwh, NSRange range);
 
   // When the renderer sends the ViewHostMsg reply, the RenderMessageFilter will
   // call the corresponding method on the IO thread to unlock the condition and
   // allow the Get*() methods to continue/return.
   void SetCharacterIndexAndSignal(NSUInteger index);
   void SetFirstRectAndSignal(NSRect first_rect);
-  void SetSubstringAndSignal(NSAttributedString* string);
 
   // This async method is invoked from RenderWidgetHostViewCocoa's
   // -quickLookWithEvent:, when the user taps a word using 3 fingers.
   // The reply callback will be invoked from the IO thread, the caller is
   // responsible for bouncing to the main thread if necessary.
   // The callback parameters provide the attributed word under the point and
   // the lower left baseline point of the text.
   void GetStringAtPoint(RenderWidgetHost* rwh,
                         gfx::Point point,
                         void (^replyHandler)(NSAttributedString*, NSPoint));
@@ skipping 10 matching lines @@
   // These methods lock the internal condition for use before the asynchronous
   // message is sent to the renderer to lookup the required information. These
   // are only used on the UI thread.
   void BeforeRequest();
   // Called at the end of a critical section. This will release the lock and
   // condition.
   void AfterRequest();
 
   NSUInteger character_index_;
   NSRect first_rect_;
-  base::scoped_nsobject<NSAttributedString> substring_;
 
   base::Lock lock_;
   base::ConditionVariable condition_;
 
   base::mac::ScopedBlock<void(^)(NSAttributedString*, NSPoint)> replyHandler_;
 
   DISALLOW_COPY_AND_ASSIGN(TextInputClientMac);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_TEXT_INPUT_CLIENT_MAC_H_