SkyView should handle screen rotation

sky/engine/core/view/View.cpp

 // Copyright 2015 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 "sky/engine/config.h"
 #include "sky/engine/core/view/View.h"
 
 namespace blink {
 
 PassRefPtr<View> View::create(const base::Closure& scheduleFrameCallback)
@@ skipping 20 matching lines @@
 {
     double h = m_displayMetrics.physical_size.height;
     return h / m_displayMetrics.device_pixel_ratio;
 }
 
 void View::setEventCallback(PassOwnPtr<EventCallback> callback)
 {
     m_eventCallback = callback;
 }
 
+void View::setMetricsChangedCallback(PassOwnPtr<VoidCallback> callback)
+{
+    m_metricsChangedCallback = callback;
+}
+
 void View::setBeginFrameCallback(PassOwnPtr<BeginFrameCallback> callback)
 {
     m_beginFrameCallback = callback;
 }
 
 void View::scheduleFrame()
 {
     m_scheduleFrameCallback.Run();
 }
 
 void View::setDisplayMetrics(const SkyDisplayMetrics& metrics)
 {
     m_displayMetrics = metrics;
+    if (m_metricsChangedCallback)
+        m_metricsChangedCallback->handleEvent();
 }
 
 void View::handleInputEvent(PassRefPtr<Event> event)
 {
     if (m_eventCallback)
         m_eventCallback->handleEvent(event.get());
 }
 
 void View::beginFrame(base::TimeTicks frameTime)
 {
     if (!m_beginFrameCallback)
         return;
     double frameTimeMS = (frameTime - base::TimeTicks()).InMillisecondsF();
     m_beginFrameCallback->handleEvent(frameTimeMS);
 }
 
 } // namespace blink