Implement screen orientation for out-of-process iframes.

content/renderer/render_widget.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/renderer/render_widget.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/auto_reset.h"
@@ skipping 1894 matching lines @@
 void RenderWidget::OnSetDeviceScaleFactor(float device_scale_factor) {
   if (device_scale_factor_ == device_scale_factor)
     return;
 
   device_scale_factor_ = device_scale_factor;
   OnDeviceScaleFactorChanged();
   physical_backing_size_ = gfx::ScaleToCeiledSize(size_, device_scale_factor_);
 }
 
 void RenderWidget::OnOrientationChange() {
+  WebWidget* web_widget = GetWebWidget();
+  if (web_widget && web_widget->IsWebFrameWidget()) {
+    WebFrameWidget* web_frame_widget = static_cast<WebFrameWidget*>(web_widget);
+    web_frame_widget->LocalRoot()->SendOrientationChangeEvent();
+  }
 }
 
 void RenderWidget::SetHidden(bool hidden) {
   if (is_hidden_ == hidden)
     return;
 
   // The status has changed.  Tell the RenderThread about it and ensure
   // throttled acks are released in case frame production ceases.
   is_hidden_ = hidden;
 
@@ skipping 407 matching lines @@
     // browser side (https://crbug.com/669219).
     // If there is no WebFrameWidget, then there will be no
     // InputMethodControllers for a WebLocalFrame.
     return nullptr;
   }
   return static_cast<blink::WebFrameWidget*>(GetWebWidget())
       ->GetActiveWebInputMethodController();
 }
 
 }  // namespace content