Add plumbing for testing API for MockWebDeviceMotionHandler injection.

content/renderer/renderer_webkitplatformsupport_impl.h

Index: content/renderer/renderer_webkitplatformsupport_impl.h
diff --git a/content/renderer/renderer_webkitplatformsupport_impl.h b/content/renderer/renderer_webkitplatformsupport_impl.h
index 14fddb9e767b3cf448f6bbf82fdb5a9ad806ea45..1cf03c03f0e6d3acacd5feaf56ccea6910bf806a 100644
--- a/content/renderer/renderer_webkitplatformsupport_impl.h
+++ b/content/renderer/renderer_webkitplatformsupport_impl.h
@@ -122,6 +122,9 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
       createSharedOffscreenGraphicsContext3DProvider();
   virtual WebKit::WebCompositorSupport* compositorSupport();
 
+  virtual void setDeviceMotionListener(
+      WebKit::WebDeviceMotionListener*) OVERRIDE;
+
   // Disables the WebSandboxSupport implementation for testing.
   // Tests that do not set up a full sandbox environment should call
   // SetSandboxEnabledForTesting(false) _before_ creating any instances
@@ -134,6 +137,10 @@ class CONTENT_EXPORT RendererWebKitPlatformSupportImpl
   // Set WebGamepads to return when sampleGamepads() is invoked.
   static void SetMockGamepadsForTesting(const WebKit::WebGamepads& pads);
 
+  // Set a mock listener to be used when setDeviceMotionListener is called.
+  static void SetMockDeviceMotionListenerForTesting(
+      WebKit::WebDeviceMotionListener*);
+
  private:
   bool CheckPreparsedJsCachingEnabled() const;