Absolute Device Orientation API: blink implementation.

third_party/WebKit/Source/modules/device_orientation/DeviceOrientationDispatcher.h

Index: third_party/WebKit/Source/modules/device_orientation/DeviceOrientationDispatcher.h
diff --git a/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationDispatcher.h b/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationDispatcher.h
index 1a0322a053d075fa8a4489ae09fc1c31f9a91689..de4cc90177c579739189dd2c30999a9aae06f1c5 100644
--- a/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationDispatcher.h
+++ b/third_party/WebKit/Source/modules/device_orientation/DeviceOrientationDispatcher.h
@@ -45,7 +45,7 @@ class WebDeviceOrientationData;
 class DeviceOrientationDispatcher final : public GarbageCollectedFinalized<DeviceOrientationDispatcher>, public PlatformEventDispatcher, public WebDeviceOrientationListener {
     USING_GARBAGE_COLLECTED_MIXIN(DeviceOrientationDispatcher);
 public:
-    static DeviceOrientationDispatcher& instance();
+    template<bool absolute = false> static DeviceOrientationDispatcher& instance();
     ~DeviceOrientationDispatcher() override;
 
     // Note that the returned object is owned by this class.
@@ -58,12 +58,13 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    DeviceOrientationDispatcher();
+    explicit DeviceOrientationDispatcher(bool absolute);
 
     // Inherited from PlatformEventDispatcher.
     void startListening() override;
     void stopListening() override;
 
+    const bool m_absolute;
     Member<DeviceOrientationData> m_lastDeviceOrientationData;
 };