Reenable triggering of screen rotations by sensors.

chrome/browser/ui/views/frame/browser_frame_aura.cc

Index: chrome/browser/ui/views/frame/browser_frame_aura.cc
diff --git a/chrome/browser/ui/views/frame/browser_frame_aura.cc b/chrome/browser/ui/views/frame/browser_frame_aura.cc
index 3b55088a589f1215d806fcc6c988b61814160c86..a5e8246cdcce329fb039f1059876216288aa5698 100644
--- a/chrome/browser/ui/views/frame/browser_frame_aura.cc
+++ b/chrome/browser/ui/views/frame/browser_frame_aura.cc
@@ -20,6 +20,10 @@
 #include "ui/gfx/font.h"
 #include "views/background.h"
 
+#if defined(TOUCH_UI)
+#include "chrome/browser/ui/touch/sensors/screen_orientation_listener.h"
+#endif
+
 namespace {
 
 // The content left/right images have a shadow built into them.
@@ -170,6 +174,11 @@ BrowserFrameAura::BrowserFrameAura(BrowserFrame* browser_frame,
     // Background only needed for Aura-style windows.
     browser_view_->set_background(new ToolbarBackground(browser_view));
   }
+
+#if defined(TOUCH_UI)
+  // Ensure that the screen orientation listener singleton is initialized.
+  ScreenOrientationListener::GetInstance();
+#endif
 }
 
 BrowserFrameAura::~BrowserFrameAura() {