WebKit & WebCore part of the device motion implementation using the platform layer.

Source/WebCore/history/PageCache.cpp

Index: Source/WebCore/history/PageCache.cpp
diff --git a/Source/WebCore/history/PageCache.cpp b/Source/WebCore/history/PageCache.cpp
index d66750012e6fb4f9a7a4c42095fe3baf64208bab..d4b6dc9ed7821330888fd589eab57acde9f5666e 100644
--- a/Source/WebCore/history/PageCache.cpp
+++ b/Source/WebCore/history/PageCache.cpp
@@ -243,7 +243,7 @@ static void logCanCachePageDecision(Page* page)
         rejectReasons |= 1 << DisabledPageCache;
     }
 #if ENABLE(DEVICE_ORIENTATION)
-    if (DeviceMotionController::isActiveAt(page)) {
+    if (DeviceMotionController::shared().isActiveAt(page)) {
         PCLOG("   -Page is using DeviceMotion");
         rejectReasons |= 1 << UsesDeviceMotion;
     }
@@ -388,7 +388,7 @@ bool PageCache::canCache(Page* page) const
         && page->backForward()->isActive()
         && page->settings()->usesPageCache()
 #if ENABLE(DEVICE_ORIENTATION)
-        && !DeviceMotionController::isActiveAt(page)
+        && !DeviceMotionController::shared().isActiveAt(page)
         && !DeviceOrientationController::isActiveAt(page)
 #endif
 #if ENABLE(PROXIMITY_EVENTS)