Make Display's rotation and WebScreenInfo rotation work together on Aura.

content/browser/renderer_host/render_widget_host_view_aura.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_widget_host_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 288 matching lines @@
 void GetScreenInfoForWindow(WebScreenInfo* results, aura::Window* window) {
   const gfx::Display display = window ?
       gfx::Screen::GetScreenFor(window)->GetDisplayNearestWindow(window) :
       gfx::Screen::GetScreenFor(window)->GetPrimaryDisplay();
   results->rect = display.bounds();
   results->availableRect = display.work_area();
   // TODO(derat|oshima): Don't hardcode this. Get this from display object.
   results->depth = 24;
   results->depthPerComponent = 8;
   results->deviceScaleFactor = display.device_scale_factor();
+
+  // The Display rotation and the WebScreenInfo orientation are not the same
+  // angle. The former is the physical display rotation while the later is the
+  // rotation required by the content to be shown properly on the screen, in
+  // other words, relative to the physical display.
   results->orientationAngle = display.RotationAsDegree();
+  if (results->orientationAngle == 90)
+    results->orientationAngle = 270;
+  else if (results->orientationAngle == 270)
+    results->orientationAngle = 90;
 }
 
 bool PointerEventActivates(const ui::Event& event) {
   if (event.type() == ui::ET_MOUSE_PRESSED)
     return true;
 
   if (event.type() == ui::ET_GESTURE_BEGIN) {
     const ui::GestureEvent& gesture =
         static_cast<const ui::GestureEvent&>(event);
     return gesture.details().touch_points() == 1;
@@ skipping 2111 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content