Disable Screen Orientation API on Win8.

content/child/runtime_features.cc

Index: content/child/runtime_features.cc
diff --git a/content/child/runtime_features.cc b/content/child/runtime_features.cc
index 29820b90ff5b6a191d76eb1508637b6302dce512..6345f3724c17583c6a33b168c8a470804fbb30f9 100644
--- a/content/child/runtime_features.cc
+++ b/content/child/runtime_features.cc
@@ -15,6 +15,8 @@
 #include "base/android/build_info.h"
 #include "base/metrics/field_trial.h"
 #include "media/base/android/media_codec_bridge.h"
+#elif defined(OS_WIN)
+#include "base/win/windows_version.h"
 #endif
 
 using blink::WebRuntimeFeatures;
@@ -67,6 +69,15 @@ static void SetRuntimeFeatureDefaultsForPlatform() {
     // Only Android, ChromeOS, and IOS support NetInfo right now.
     WebRuntimeFeatures::enableNetworkInformation(false);
 #endif
+
+#if defined(OS_WIN)
+  // Screen Orientation API is currently broken on Windows 8 Metro mode and
+  // until we can find how to disable it only for Blink instances running in a
+  // renderer process in Metro, we need to disable the API altogether for Win8.
+  // See http://crbug.com/400846
+  if (base::win::OSInfo::GetInstance()->version() >= base::win::VERSION_WIN8)
+    WebRuntimeFeatures::enableScreenOrientation(false);
+#endif // OS_WIN
 }
 
 void SetRuntimeFeaturesDefaultsAndUpdateFromArgs(