"Load image" context menu item to reload a LoFi image.

chrome/common/render_messages.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.
 
 // Multiply-included file, no traditional include guard.
 #include <stdint.h>
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 274 matching lines @@
 
 // Sent on process startup to indicate whether this process is running in
 // incognito mode.
 IPC_MESSAGE_CONTROL1(ChromeViewMsg_SetIsIncognitoProcess,
                      bool /* is_incognito_processs */)
 
 // Sent when the profile changes the kSafeBrowsingEnabled preference.
 IPC_MESSAGE_ROUTED1(ChromeViewMsg_SetClientSidePhishingDetection,
                     bool /* enable_phishing_detection */)
 
+// Reloads the image the image selected by the most recently opened context menu
+// (if there indeed is an image at that location).
+IPC_MESSAGE_ROUTED0(ChromeViewMsg_RequestReloadImageForContextNode)
+
 // Asks the renderer for a thumbnail of the image selected by the most
 // recently opened context menu, if there is one. If the image's area
 // is greater than thumbnail_min_area it will be downscaled to
 // be within thumbnail_max_size. The possibly downsampled image will be
 // returned in a ChromeViewHostMsg_RequestThumbnailForContextNode_ACK message.
 IPC_MESSAGE_ROUTED2(ChromeViewMsg_RequestThumbnailForContextNode,
                     int /* thumbnail_min_area_pixels */,
                     gfx::Size /* thumbnail_max_size_pixels */)
 
 // Notifies the renderer whether hiding/showing the top controls is enabled,
@@ skipping 311 matching lines @@
 
 // Record a sample string to a Rappor metric.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_RecordRappor,
                      std::string /* metric */,
                      std::string /* sample */)
 
 // Record a domain and registry of a url to a Rappor metric.
 IPC_MESSAGE_CONTROL2(ChromeViewHostMsg_RecordRapporURL,
                      std::string /* metric */,
                      GURL /* sample url */)