Pass implementation object to supplemental classes by reference

Source/web/FrameLoaderClientImpl.cpp

Index: Source/web/FrameLoaderClientImpl.cpp
diff --git a/Source/web/FrameLoaderClientImpl.cpp b/Source/web/FrameLoaderClientImpl.cpp
index 3a8eb5e438717fa250373d474b194ad5d87975b9..9ff3f5f15ed45accdf3baac7deb4bfa623b3d455 100644
--- a/Source/web/FrameLoaderClientImpl.cpp
+++ b/Source/web/FrameLoaderClientImpl.cpp
@@ -117,11 +117,11 @@ void FrameLoaderClientImpl::dispatchDidClearWindowObjectInWorld(DOMWrapperWorld*
         m_webFrame->client()->didClearWindowObject(m_webFrame, world->worldId());
         Document* document = m_webFrame->frame()->document();
         if (document) {
-            WheelController::from(document);
+            WheelController::from(*document);
             if (RuntimeEnabledFeatures::deviceMotionEnabled())
-                DeviceMotionController::from(document);
+                DeviceMotionController::from(*document);
             if (RuntimeEnabledFeatures::deviceOrientationEnabled())
-                DeviceOrientationController::from(document);
+                DeviceOrientationController::from(*document);
         }
     }
 }
@@ -504,7 +504,8 @@ void FrameLoaderClientImpl::postProgressFinishedNotification()
 void FrameLoaderClientImpl::loadURLExternally(const ResourceRequest& request, NavigationPolicy policy, const String& suggestedName)
 {
     if (m_webFrame->client()) {
-        DocumentFullscreen::webkitCancelFullScreen(m_webFrame->frame()->document());
+        ASSERT(m_webFrame->frame()->document());
+        DocumentFullscreen::webkitCancelFullScreen(*m_webFrame->frame()->document());
         WrappedResourceRequest webreq(request);
         m_webFrame->client()->loadURLExternally(
             m_webFrame, webreq, static_cast<WebNavigationPolicy>(policy), suggestedName);