Partially convert geolocation IPC to Mojo.

content/public/common/mojo_geoposition.mojom

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file declares the Geoposition structure, used to represent a position
 // fix. It was originally derived from:
 // http://gears.googlecode.com/svn/trunk/gears/geolocation/geolocation.h
+// TODO(blundell): Investigate killing content::Geoposition in favor of using
+// this struct everywhere (and renaming it to Geoposition).
 
-#ifndef CONTENT_PUBLIC_COMMON_GEOPOSITION_H_
-#define CONTENT_PUBLIC_COMMON_GEOPOSITION_H_
+module content {
 
-#include <string>
-
-#include "base/time/time.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-struct CONTENT_EXPORT Geoposition {
- public:
+struct MojoGeoposition {
   // These values follow the W3C geolocation specification and can be returned
   // to JavaScript without the need for a conversion.
   enum ErrorCode {
     ERROR_CODE_NONE = 0,  // Chrome addition.
     ERROR_CODE_PERMISSION_DENIED = 1,
     ERROR_CODE_POSITION_UNAVAILABLE = 2,
     ERROR_CODE_TIMEOUT = 3,
     ERROR_CODE_LAST = ERROR_CODE_TIMEOUT
   };
 
-  // All fields are initialized to sentinel values marking them as invalid. The
-  // error code is set to ERROR_CODE_NONE.
-  Geoposition();
-
-  // A valid fix has a valid latitude, longitude, accuracy and timestamp.
-  bool Validate() const;
+  // Whether this geoposition is valid.
+  bool valid;
 
   // These properties correspond to those of the JavaScript Position object
   // although their types may differ.
   // Latitude in decimal degrees north (WGS84 coordinate frame).
   double latitude;
   // Longitude in decimal degrees west (WGS84 coordinate frame).
   double longitude;
   // Altitude in meters (above WGS84 datum).
   double altitude;
   // Accuracy of horizontal position in meters.
   double accuracy;
   // Accuracy of altitude in meters.
   double altitude_accuracy;
   // Heading in decimal degrees clockwise from true north.
   double heading;
   // Horizontal component of device velocity in meters per second.
   double speed;
-  // Time of position measurement in milisecons since Epoch in UTC time. This is
+  // TODO(blundell): If I need to represent this differently to use this
+  // struct to replace content::Geolocation, I'll need to convert
+  // correctly into seconds-since-epoch when using this in
+  // GeolocationDispatcher::OnLocationUpdate().
+  // Time of position measurement in seconds since Epoch in UTC time. This is
   // taken from the host computer's system clock (i.e. from Time::Now(), not the
   // source device's clock).
-  base::Time timestamp;
+  double timestamp;
 
   // Error code, see enum above.
   ErrorCode error_code;
   // Human-readable error message.
-  std::string error_message;
+  string error_message;
 };
 
-}  // namespace content
-
-#endif  // CONTENT_COMMON_GEOPOSITION_H_
+}