Add plumbing for testing API for MockWebDeviceMotionHandler injection.

webkit/support/test_webkit_platform_support.h

Index: webkit/support/test_webkit_platform_support.h
diff --git a/webkit/support/test_webkit_platform_support.h b/webkit/support/test_webkit_platform_support.h
index d06833c6ab03f5166635af56835cda9de7620ed3..c5d4b21ea16d22a839a7176510a1900141f07b6e 100644
--- a/webkit/support/test_webkit_platform_support.h
+++ b/webkit/support/test_webkit_platform_support.h
@@ -6,6 +6,7 @@
 #define WEBKIT_SUPPORT_TEST_WEBKIT_PLATFORM_SUPPORT_H_
 
 #include "base/compiler_specific.h"
+#include "third_party/WebKit/Source/Platform/chromium/public/WebDeviceMotionListener.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGamepads.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebGraphicsContext3D.h"
 #include "third_party/WebKit/Source/Platform/chromium/public/WebUnitTestSupport.h"
@@ -168,6 +169,8 @@ class TestWebKitPlatformSupport :
     threaded_compositing_enabled_ = enabled;
   }
 
+  void setDeviceMotionListener(WebKit::WebDeviceMotionListener*);
+
  private:
   TestShellWebMimeRegistryImpl mime_registry_;
   MockWebClipboardImpl mock_clipboard_;
@@ -187,6 +190,7 @@ class TestWebKitPlatformSupport :
   WebKit::Platform* shadow_platform_delegate_;
   bool threaded_compositing_enabled_;
   webkit::WebCompositorSupportImpl compositor_support_;
+  WebKit::WebDeviceMotionListener* device_motion_listener_;
 
   scoped_refptr<cc::ContextProvider> main_thread_contexts_;