Start passing Title text with the context menu data.

public/web/WebContextMenuData.h

 /*
  * Copyright (C) 2009, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 101 matching lines @@
         MediaCanPrint = 0x100,
         MediaCanRotate = 0x200,
     };
 
     // Extra attributes describing media elements.
     int mediaFlags;
 
     // The raw text of the selection in context.
     WebString selectedText;
 
+    // Title attribute or alt attribute (if title is not available) of the selection in context.
+    WebString titleText;
+
     // Whether spell checking is enabled.
     bool isSpellCheckingEnabled;
 
     // Suggested filename for saving file.
     WebString suggestedFilename;
 
     // The editable (possibily) misspelled word.
     WebString misspelledWord;
 
     // The identifier of the misspelling.
@@ skipping 54 matching lines @@
         , isEditable(false)
         , writingDirectionDefault(CheckableMenuItemDisabled)
         , writingDirectionLeftToRight(CheckableMenuItemEnabled)
         , writingDirectionRightToLeft(CheckableMenuItemEnabled)
         , editFlags(0) { }
 };
 
 } // namespace blink
 
 #endif