Implement the Blink part of the Device Motion API.

Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h

Index: Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h
diff --git a/Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h b/Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h
index e8f0c80bb47740c27f76c3034221e74c0e5486eb..abb2f78bb0a3c26508b80ba8a4dacd0016c0c951 100644
--- a/Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h
+++ b/Tools/DumpRenderTree/chromium/TestRunner/public/WebTestProxy.h
@@ -88,6 +88,7 @@ class SkCanvas;
 
 namespace WebTestRunner {
 
+class MockWebDeviceMotionProvider;
 class MockWebSpeechInputController;
 class MockWebSpeechRecognizer;
 class SpellCheckClient;
@@ -123,6 +124,7 @@ public:
     WebKit::WebGeolocationClientMock* geolocationClientMock();
     MockWebSpeechInputController* speechInputControllerMock();
     MockWebSpeechRecognizer* speechRecognizerMock();
+    MockWebDeviceMotionProvider* deviceMotionProviderMock();
 #endif
 
 protected:
@@ -229,6 +231,7 @@ private:
     std::auto_ptr<WebKit::WebDeviceOrientationClientMock> m_deviceOrientationClient;
     std::auto_ptr<MockWebSpeechRecognizer> m_speechRecognizer;
     std::auto_ptr<MockWebSpeechInputController> m_speechInputController;
+    std::auto_ptr<MockWebDeviceMotionProvider> m_deviceMotionProvider;
 
 private:
     WebTestProxyBase(WebTestProxyBase&);