Fix context menu "Copy image" not working sometimes at hidpi.

content/renderer/render_frame_impl.cc

 // 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 1955 matching lines @@
 }
 
 void RenderFrameImpl::OnReplaceMisspelling(const base::string16& text) {
   if (!frame_->hasSelection())
     return;
 
   frame_->replaceMisspelledRange(text);
 }
 
 void RenderFrameImpl::OnCopyImageAt(int x, int y) {
-  frame_->copyImageAt(WebPoint(x, y));
+  blink::WebFloatRect viewport_position(x, y, 0, 0);
+  GetRenderWidget()->convertWindowToViewport(&viewport_position);
+  frame_->copyImageAt(WebPoint(viewport_position.x, viewport_position.y));
 }
 
 void RenderFrameImpl::OnSaveImageAt(int x, int y) {
-  frame_->saveImageAt(WebPoint(x, y));
+  blink::WebFloatRect viewport_position(x, y, 0, 0);
+  GetRenderWidget()->convertWindowToViewport(&viewport_position);
+  frame_->saveImageAt(WebPoint(viewport_position.x, viewport_position.y));
 }
 
 void RenderFrameImpl::OnAddMessageToConsole(ConsoleMessageLevel level,
                                             const std::string& message) {
   AddMessageToConsole(level, message);
 }
 
 void RenderFrameImpl::OnJavaScriptExecuteRequest(
     const base::string16& jscript,
     int id,
@@ skipping 4644 matching lines @@
   // event target. Potentially a Pepper plugin will receive the event.
   // In order to tell whether a plugin gets the last mouse event and which it
   // is, we set |pepper_last_mouse_event_target_| to null here. If a plugin gets
   // the event, it will notify us via DidReceiveMouseEvent() and set itself as
   // |pepper_last_mouse_event_target_|.
   pepper_last_mouse_event_target_ = nullptr;
 #endif
 }
 
 }  // namespace content