Revert 76228 - Move core pieces of geolocation from chrome to content.This is...

content/browser/geolocation/core_location_data_provider_mac.mm

Index: content/browser/geolocation/core_location_data_provider_mac.mm
===================================================================
--- content/browser/geolocation/core_location_data_provider_mac.mm	(revision 76230)
+++ content/browser/geolocation/core_location_data_provider_mac.mm	(working copy)
@@ -1,246 +0,0 @@
-// Copyright (c) 2010 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 contains the class definitions for the CoreLocation data provider
-// class and the accompanying Objective C wrapper class. This data provider
-// is used to allow the CoreLocation wrapper to run on the UI thread, since
-// CLLocationManager's start and stop updating methods must be called from a
-// thread with an active NSRunLoop.  Currently only the UI thread appears to
-// fill that requirement.
-
-#include "content/browser/geolocation/core_location_data_provider_mac.h"
-
-#include "base/logging.h"
-#include "base/time.h"
-#include "content/browser/geolocation/core_location_provider_mac.h"
-#include "content/browser/geolocation/geolocation_provider.h"
-
-// A few required declarations since the CoreLocation headers are not available
-// with the Mac OS X 10.5 SDK.
-// TODO(jorgevillatoro): Remove these declarations when we build against 10.6
-
-// This idea was borrowed from wifi_data_provider_corewlan_mac.mm
-typedef double CLLocationDegrees;
-typedef double CLLocationAccuracy;
-typedef double CLLocationSpeed;
-typedef double CLLocationDirection;
-typedef double CLLocationDistance;
-typedef struct {
-  CLLocationDegrees latitude;
-  CLLocationDegrees longitude;
-} CLLocationCoordinate2D;
-
-enum {
-  kCLErrorLocationUnknown  = 0,
-  kCLErrorDenied
-};
-
-@interface CLLocationManager : NSObject
-+ (BOOL)locationServicesEnabled;
-@property(assign) id delegate;
-- (void)startUpdatingLocation;
-- (void)stopUpdatingLocation;
-@end
-
-@interface CLLocation : NSObject<NSCopying, NSCoding>
-@property(readonly) CLLocationCoordinate2D coordinate;
-@property(readonly) CLLocationDistance altitude;
-@property(readonly) CLLocationAccuracy horizontalAccuracy;
-@property(readonly) CLLocationAccuracy verticalAccuracy;
-@property(readonly) CLLocationDirection course;
-@property(readonly) CLLocationSpeed speed;
-@end
-
-@protocol CLLocationManagerDelegate
-- (void)locationManager:(CLLocationManager*)manager
-    didUpdateToLocation:(CLLocation*)newLocation
-           fromLocation:(CLLocation*)oldLocation;
-- (void)locationManager:(CLLocationManager*)manager
-       didFailWithError:(NSError*)error;
-@end
-
-// This wrapper class receives CLLocation objects from CoreLocation, converts
-// them to Geoposition objects, and passes them on to the data provider class
-// Note: This class has some specific threading requirements, inherited from
-//       CLLocationManager.  The location manaager's start and stop updating
-//       methods must be called from a thread that has an active run loop (which
-//       seems to only be the UI thread)
-@interface CoreLocationWrapperMac : NSObject<CLLocationManagerDelegate>
-{
- @private
-  NSBundle* bundle_;
-  Class locationManagerClass_;
-  id locationManager_;
-  CoreLocationDataProviderMac* dataProvider_;
-}
-
-- (id)initWithDataProvider:(CoreLocationDataProviderMac*)dataProvider;
-- (void)dealloc;
-
-// Can be called from any thread since it does not require an NSRunLoop. However
-// it is not threadsafe to receive concurrent calls until after it's first
-// successful call (to avoid |bundle_| being double initialized)
-- (BOOL)locationDataAvailable;
-
-// These should always be called from BrowserThread::UI
-- (void)startLocation;
-- (void)stopLocation;
-
-// These should only be called by CLLocationManager
-- (void)locationManager:(CLLocationManager*)manager
-    didUpdateToLocation:(CLLocation*)newLocation
-           fromLocation:(CLLocation*)oldLocation;
-- (void)locationManager:(CLLocationManager*)manager
-       didFailWithError:(NSError*)error;
-- (BOOL)loadCoreLocationBundle;
-
-@end
-
-@implementation CoreLocationWrapperMac
-
-- (id)initWithDataProvider:(CoreLocationDataProviderMac*)dataProvider {
-  DCHECK(dataProvider);
-  dataProvider_ = dataProvider;
-  self = [super init];
-  return self;
-}
-
-- (void)dealloc {
-  [locationManager_ release];
-  [locationManagerClass_ release];
-  [bundle_ release];
-  [super dealloc];
-}
-
-// Load the bundle and check to see if location services are enabled
-// but don't do anything else
-- (BOOL)locationDataAvailable {
-  return ([self loadCoreLocationBundle] &&
-          [locationManagerClass_ locationServicesEnabled]);
-}
-
-- (void)startLocation {
-  if ([self locationDataAvailable]) {
-    if (!locationManager_) {
-      locationManager_ = [[locationManagerClass_ alloc] init];
-      [locationManager_ setDelegate:self];
-    }
-    [locationManager_ startUpdatingLocation];
-  }
-}
-
-- (void)stopLocation {
-  [locationManager_ stopUpdatingLocation];
-}
-
-- (void)locationManager:(CLLocationManager*)manager
-    didUpdateToLocation:(CLLocation*)newLocation
-           fromLocation:(CLLocation*)oldLocation {
-  Geoposition position;
-  position.latitude  = [newLocation coordinate].latitude;
-  position.longitude = [newLocation coordinate].longitude;
-  position.altitude  = [newLocation altitude];
-  position.accuracy  = [newLocation horizontalAccuracy];
-  position.altitude_accuracy = [newLocation verticalAccuracy];
-  position.speed = [newLocation speed];
-  position.heading = [newLocation course];
-  position.timestamp = base::Time::Now();
-  position.error_code = Geoposition::ERROR_CODE_NONE;
-  dataProvider_->UpdatePosition(&position);
-}
-
-- (void)locationManager:(CLLocationManager*)manager
-       didFailWithError:(NSError*)error {
-  Geoposition position;
-  switch ([error code]) {
-    case kCLErrorLocationUnknown:
-      position.error_code = Geoposition::ERROR_CODE_POSITION_UNAVAILABLE;
-      break;
-    case kCLErrorDenied:
-      position.error_code = Geoposition::ERROR_CODE_PERMISSION_DENIED;
-      break;
-    default:
-      NOTREACHED() << "Unknown CoreLocation error: " << [error code];
-      return;
-  }
-  dataProvider_->UpdatePosition(&position);
-}
-
-- (BOOL)loadCoreLocationBundle {
-  if (!bundle_) {
-    bundle_ = [[NSBundle alloc]
-        initWithPath:@"/System/Library/Frameworks/CoreLocation.framework"];
-    if (!bundle_) {
-      DLOG(WARNING) << "Couldn't load CoreLocation Framework";
-      return NO;
-    }
-
-    locationManagerClass_ = [bundle_ classNamed:@"CLLocationManager"];
-  }
-
-  return YES;
-}
-
-@end
-
-CoreLocationDataProviderMac::CoreLocationDataProviderMac() {
-  if (MessageLoop::current() !=
-      GeolocationProvider::GetInstance()->message_loop()) {
-    NOTREACHED() << "CoreLocation data provider must be created on "
-        "the Geolocation thread.";
-  }
-  provider_ = NULL;
-  wrapper_.reset([[CoreLocationWrapperMac alloc] initWithDataProvider:this]);
-}
-
-CoreLocationDataProviderMac::~CoreLocationDataProviderMac() {
-}
-
-// Returns true if the CoreLocation wrapper can load the framework and
-// location services are enabled.  The pointer argument will only be accessed
-// in the origin thread.
-bool CoreLocationDataProviderMac::
-    StartUpdating(CoreLocationProviderMac* provider) {
-  DCHECK(provider);
-  DCHECK(!provider_) << "StartUpdating called twice";
-  if (![wrapper_ locationDataAvailable]) return false;
-  provider_ = provider;
-  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-     NewRunnableMethod(this, &CoreLocationDataProviderMac::StartUpdatingTask));
-  return true;
-}
-
-// Clears provider_ so that any leftover messages from CoreLocation get ignored
-void CoreLocationDataProviderMac::StopUpdating() {
-  provider_ = NULL;
-  BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
-              NewRunnableMethod(this,
-                               &CoreLocationDataProviderMac::StopUpdatingTask));
-}
-
-void CoreLocationDataProviderMac::UpdatePosition(Geoposition *position) {
-  GeolocationProvider::GetInstance()->message_loop()->PostTask(FROM_HERE,
-              NewRunnableMethod(this,
-                               &CoreLocationDataProviderMac::PositionUpdated,
-                               *position));
-}
-
-// Runs in BrowserThread::UI
-void CoreLocationDataProviderMac::StartUpdatingTask() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  [wrapper_ startLocation];
-}
-
-// Runs in BrowserThread::UI
-void CoreLocationDataProviderMac::StopUpdatingTask() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
-  [wrapper_ stopLocation];
-}
-
-void CoreLocationDataProviderMac::PositionUpdated(Geoposition position) {
-  DCHECK(MessageLoop::current() ==
-         GeolocationProvider::GetInstance()->message_loop());
-  if (provider_)
-    provider_->SetPosition(&position);
-}