Add RAPPOR metric recording for Device{Orientation,Motion} in blink.

Source/modules/device_orientation/DeviceMotionController.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "modules/device_orientation/DeviceMotionController.h"
 
 #include "core/dom/Document.h"
 #include "core/frame/Settings.h"
 #include "core/frame/UseCounter.h"
 #include "modules/EventModules.h"
 #include "modules/device_orientation/DeviceMotionData.h"
 #include "modules/device_orientation/DeviceMotionDispatcher.h"
 #include "modules/device_orientation/DeviceMotionEvent.h"
 #include "platform/weborigin/SecurityOrigin.h"
+#include "public/platform/Platform.h"
 
 namespace blink {
 
 DeviceMotionController::DeviceMotionController(Document& document)
     : DeviceSingleWindowEventController(document)
 {
 }
 
 DeviceMotionController::~DeviceMotionController()
 {
@@ skipping 26 matching lines @@
         String errorMessage;
         if (document().securityOrigin()->canAccessFeatureRequiringSecureOrigin(errorMessage)) {
             UseCounter::count(document().frame(), UseCounter::DeviceMotionSecureOrigin);
         } else {
             UseCounter::count(document().frame(), UseCounter::DeviceMotionInsecureOrigin);
             if (document().frame()->settings()->strictPowerfulFeatureRestrictions())
                 return;
         }
     }
 
+    if (!m_hasEventListener)
+        Platform::current()->recordRapporMetric(WebPlatformEventDeviceMotion, WebURL(document().url()));
+
     DeviceSingleWindowEventController::didAddEventListener(window, eventType);
 }
 
 bool DeviceMotionController::hasLastData()
 {
     return DeviceMotionDispatcher::instance().latestDeviceMotionData();
 }
 
 void DeviceMotionController::registerWithDispatcher()
 {
@@ skipping 21 matching lines @@
     return EventTypeNames::devicemotion;
 }
 
 DEFINE_TRACE(DeviceMotionController)
 {
     DeviceSingleWindowEventController::trace(visitor);
     DocumentSupplement::trace(visitor);
 }
 
 } // namespace blink