Add plumbing for platform based Device Motion testing.

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 95929fffbe18efd9900ec8c5f6034b0ca4018631..50dd87cb59419ac9f036f1707e9ac95773387e06 100644
--- a/webkit/support/test_webkit_platform_support.h
+++ b/webkit/support/test_webkit_platform_support.h
@@ -7,6 +7,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/files/scoped_temp_dir.h"
+#include "third_party/WebKit/public/platform/WebDeviceMotionData.h"
 #include "third_party/WebKit/public/platform/WebGamepads.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/WebKit/public/platform/WebUnitTestSupport.h"
@@ -104,6 +105,8 @@ class TestWebKitPlatformSupport :
   virtual void sampleGamepads(WebKit::WebGamepads& data);
   void setGamepadData(const WebKit::WebGamepads& data);
 
+  void setDeviceMotionData(const WebKit::WebDeviceMotionData& data);
+
   virtual base::string16 GetLocalizedString(int message_id) OVERRIDE;
   virtual base::StringPiece GetDataResource(
       int resource_id,
@@ -154,6 +157,7 @@ class TestWebKitPlatformSupport :
   webkit_glue::MockWebHyphenator hyphenator_;
   WebURLLoaderMockFactory url_loader_factory_;
   WebKit::WebGamepads gamepad_data_;
+  WebKit::WebDeviceMotionData device_motion_data_;
   webkit::WebCompositorSupportImpl compositor_support_;
 
   scoped_refptr<cc::ContextProvider> main_thread_contexts_;