Blink-side layout tests for the new Device Orientation API.

public/testing/WebTestDelegate.h

Index: public/testing/WebTestDelegate.h
diff --git a/public/testing/WebTestDelegate.h b/public/testing/WebTestDelegate.h
index 552a065691098a8edc4dc66d6797c6213df0b52d..82c7b82768060fe65925d027b228ec0e1b590f9a 100644
--- a/public/testing/WebTestDelegate.h
+++ b/public/testing/WebTestDelegate.h
@@ -40,6 +40,7 @@
 
 namespace WebKit {
 class WebDeviceMotionData;
+class WebDeviceOrientationData;
 class WebFrame;
 class WebGamepads;
 class WebHistoryItem;
@@ -64,7 +65,10 @@ public:
     // Set the gamepads to return from Platform::sampleGamepads().
     virtual void setGamepadData(const WebKit::WebGamepads&) = 0;
 
+    // Set data to return when registering via Platform::setDeviceMotionListener().
     virtual void setDeviceMotionData(const WebKit::WebDeviceMotionData&) = 0;
+    // Set data to return when registering via Platform::setDeviceOrientationListener().
+    virtual void setDeviceOrientationData(const WebKit::WebDeviceOrientationData&) = 0;
 
     // Add a message to the text dump for the layout test.
     virtual void printMessage(const std::string& message) = 0;