Reload Lo-Fi images inline instead of reloading the whole page

content/common/frame_messages.h

 // Copyright 2013 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 561 matching lines @@
 
 // Notifies the embedding frame that the process rendering the child frame's
 // contents has terminated.
 IPC_MESSAGE_ROUTED0(FrameMsg_ChildFrameProcessGone)
 
 // Sent in response to a FrameHostMsg_ContextMenu to let the renderer know that
 // the menu has been closed.
 IPC_MESSAGE_ROUTED1(FrameMsg_ContextMenuClosed,
                     content::CustomContextMenuContext /* custom_context */)
 
+// Reloads all the Lo-Fi images in the RenderFrame. Ignores the cache and
+// reloads from the network.
+IPC_MESSAGE_ROUTED0(FrameMsg_ReloadLoFiImages)
+
 // Executes custom context menu action that was provided from Blink.
 IPC_MESSAGE_ROUTED2(FrameMsg_CustomContextMenuAction,
                     content::CustomContextMenuContext /* custom_context */,
                     unsigned /* action */)
 
 // Requests that the RenderFrame or RenderFrameProxy updates its opener to the
 // specified frame.  The routing ID may be MSG_ROUTING_NONE if the opener was
 // disowned.
 IPC_MESSAGE_ROUTED1(FrameMsg_UpdateOpener, int /* opener_routing_id */)
 
@@ skipping 850 matching lines @@
 IPC_MESSAGE_ROUTED3(FrameHostMsg_FindMatchRects_Reply,
                     int /* version */,
                     std::vector<gfx::RectF> /* rects */,
                     gfx::RectF /* active_rect */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.