Enabled the "search web for image" context menu item when "Yandex"

chrome/common/render_messages.h

Index: chrome/common/render_messages.h
diff --git a/chrome/common/render_messages.h b/chrome/common/render_messages.h
index a1af6f950a2997756a52754f4f8161c797032155..adb37a999afe9bdd0a59311bd470dfb84c6f1933 100644
--- a/chrome/common/render_messages.h
+++ b/chrome/common/render_messages.h
@@ -339,8 +339,9 @@ IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetWindowFeatures,
 
 // Responds to the request for a thumbnail.
 // Thumbnail data will be empty is a thumbnail could not be produced.
-IPC_MESSAGE_ROUTED2(ChromeViewHostMsg_RequestThumbnailForContextNode_ACK,
-                    std::string /* JPEG-encoded thumbnail data */,
+IPC_MESSAGE_ROUTED3(ChromeViewHostMsg_RequestThumbnailForContextNode_ACK,
+                    std::string /* thumbnail data */,
+                    std::string /* format of the thumbnail data */,
                     gfx::Size /* original size of the image */)
 
 // Requests application info for the page. The renderer responds back with