Don't show the search-by-image menu item when the image is blocked (no image pixel data)

content/public/common/context_menu_params.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_PUBLIC_COMMON_CONTEXT_MENU_PARAMS_H_
 #define CONTENT_PUBLIC_COMMON_CONTEXT_MENU_PARAMS_H_
 
+#include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
 #include "content/public/common/menu_item.h"
 #include "content/public/common/page_state.h"
 #include "content/public/common/ssl_status.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "third_party/WebKit/public/web/WebContextMenuData.h"
@@ skipping 47 matching lines @@
 
   // The link URL to be used ONLY for "copy link address". We don't validate
   // this field in the frontend process.
   GURL unfiltered_link_url;
 
   // This is the source URL for the element that the context menu was
   // invoked on.  Example of elements with source URLs are img, audio, and
   // video.
   GURL src_url;
 
-  // This is true if the context menu was invoked on a blocked image.
-  bool is_image_blocked;
+  // This is true if the context menu was invoked on an image which has
+  // non-empty contents.
+  bool has_image_contents;
 
   // This is the URL of the top level page that the context menu was invoked
   // on.
   GURL page_url;
 
   // This is the absolute keyword search URL including the %s search tag when
   // the "Add as search engine..." option is clicked (left empty if not used).
   GURL keyword_url;
 
   // This is the URL of the subframe that the context menu was invoked on.
@@ skipping 60 matching lines @@
   std::vector<MenuItem> custom_items;
 
   ui::MenuSourceType source_type;
 
 #if defined(OS_ANDROID)
   // Points representing the coordinates in the document space of the start and
   // end of the selection, if there is one.
   gfx::Point selection_start;
   gfx::Point selection_end;
 #endif
-
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTEXT_MENU_PARAMS_H_