Fix the position of context menu for BrowserPlugins inside OOPIF (Merge to M-57)

content/browser/browser_plugin/browser_plugin_guest.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/browser_plugin/browser_plugin_guest.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 467 matching lines @@
     resent_wheel_event.resendingPluginId = browser_plugin_instance_id_;
     // TODO(wjmaclean): Initialize latency info correctly for OOPIFs.
     // https://crbug.com/613628
     ui::LatencyInfo latency_info(ui::SourceEventType::WHEEL);
     view->ProcessMouseWheelEvent(resent_wheel_event, latency_info);
   } else {
     NOTIMPLEMENTED();
   }
 }
 
+gfx::Point BrowserPluginGuest::GetCoordinatesInEmbedderWebContents(
+    const gfx::Point& relative_point) {
+  RenderWidgetHostView* owner_rwhv = GetOwnerRenderWidgetHostView();
+  if (!owner_rwhv)
+    return relative_point;
+
+  gfx::Point point(relative_point);
+
+  // Add the offset form the embedder web contents view.
+  point +=
+      owner_rwhv->TransformPointToRootCoordSpace(guest_window_rect_.origin())
+          .OffsetFromOrigin();
+  return point;
+}
+
 WebContentsImpl* BrowserPluginGuest::GetWebContents() const {
   return static_cast<WebContentsImpl*>(web_contents());
 }
 
 gfx::Point BrowserPluginGuest::GetScreenCoordinates(
     const gfx::Point& relative_position) const {
   if (!attached())
     return relative_position;
 
   gfx::Point screen_pos(relative_position);
@@ skipping 558 matching lines @@
           range, character_bounds);
 }
 #endif
 
 void BrowserPluginGuest::SetContextMenuPosition(const gfx::Point& position) {
   if (delegate_)
     delegate_->SetContextMenuPosition(position);
 }
 
 }  // namespace content