Enable Device Motion API on all platforms by default.

content/public/common/content_switches.cc

Index: content/public/common/content_switches.cc
diff --git a/content/public/common/content_switches.cc b/content/public/common/content_switches.cc
index 8f0d2a211087ed8f4846c2d6bd69b9058ef4d47b..f53b39e30a6ce159d807b2b70b6ab57ef515db82 100644
--- a/content/public/common/content_switches.cc
+++ b/content/public/common/content_switches.cc
@@ -140,7 +140,10 @@ const char kDisableDelegatedRenderer[]      = "disable-delegated-renderer";
 // Disables desktop notifications (default enabled on windows).
 const char kDisableDesktopNotifications[]   = "disable-desktop-notifications";
 
-// Disables device orientation events.
+// Disable device motion events.
+const char kDisableDeviceMotion[]           = "disable-device-motion";
+
+// Disable device orientation events.
 const char kDisableDeviceOrientation[]      = "disable-device-orientation";
 
 // Disable experimental WebGL support.
@@ -904,9 +907,6 @@ const char kEnableWebRtcTcpServerSocket[]   = "enable-webrtc-tcp-server-socket";
 #endif
 
 #if defined(OS_ANDROID)
-// Disables device motion events.
-const char kDisableDeviceMotion[]           = "disable-device-motion";
-
 // Disable user gesture requirement for the media element to enter fullscreen.
 const char kDisableGestureRequirementForMediaFullscreen[] =
     "disable-gesture-requirement-for-media-fullscreen";