Add RAPPOR metric recording for Device{Orientation,Motion} in blink.

public/platform/Platform.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 588 matching lines @@
     // Device Orientation, Device Motion, Device Light, Battery, Gamepad.
 
     // Request the platform to start listening to the events of the specified
     // type and notify the given listener (if not null) when there is an update.
     virtual void startListening(WebPlatformEventType type, WebPlatformEventListener* listener) { }
 
     // Request the platform to stop listening to the specified event and no
     // longer notify the listener, if any.
     virtual void stopListening(WebPlatformEventType type) { }
 
+    virtual void recordRapporMetric(WebPlatformEventType type, const WebURL& url) { }

[Mike West, 2015/03/23 17:27:30]

Don't we already have "recordRappor"? Why do we need another method?

[timvolodine, 2015/03/23 17:33:30]

I understood from holte@ that there is currently no way to log from blink, i.e.
we need to send IPC to the browser, since rappor metrics have to be recorded on
the browser UI thread.. There is a crbug.com/429901 for this but it has not been
implemented yet.

+
     // This method converts from the supplied DOM code enum to the
     // embedder's DOM code value for the key pressed. |domCode| values are
     // based on the value defined in ui/events/keycodes/dom4/keycode_converter_data.h.
     // Returns null string, if DOM code value is not found.
     virtual WebString domCodeStringFromEnum(int domCode) { return WebString(); }
 
     // This method converts from the suppled DOM code value to the
     // embedder's DOM code enum for the key pressed. |codeString| is defined in
     // ui/events/keycodes/dom4/keycode_converter_data.h.
     // Returns 0, if DOM code enum is not found.
@@ skipping 50 matching lines @@
 protected:
     BLINK_PLATFORM_EXPORT Platform();
     virtual ~Platform() { }
 
     WebThread* m_mainThread;
 };
 
 } // namespace blink
 
 #endif