Implement "Save image as" for canvas (chromium side).

content/browser/renderer_host/render_view_host_impl.cc

 // 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.
 
 #include "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 1567 matching lines @@
 
 void RenderViewHostImpl::DisableAutoResize(const gfx::Size& new_size) {
   SetShouldAutoResize(false);
   Send(new ViewMsg_DisableAutoResize(GetRoutingID(), new_size));
 }
 
 void RenderViewHostImpl::CopyImageAt(int x, int y) {
   Send(new ViewMsg_CopyImageAt(GetRoutingID(), x, y));
 }
 
+void RenderViewHostImpl::SaveImageAt(int x, int y) {
+  Send(new ViewMsg_SaveImageAt(GetRoutingID(), x, y));
+}
+
 void RenderViewHostImpl::ExecuteMediaPlayerActionAtLocation(
   const gfx::Point& location, const blink::WebMediaPlayerAction& action) {
   Send(new ViewMsg_MediaPlayerActionAt(GetRoutingID(), location, action));
 }
 
 void RenderViewHostImpl::ExecutePluginActionAtLocation(
   const gfx::Point& location, const blink::WebPluginAction& action) {
   Send(new ViewMsg_PluginActionAt(GetRoutingID(), location, action));
 }
 
@@ skipping 147 matching lines @@
   return true;
 }
 
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
 }
 
 }  // namespace content