Revert "mac: Allow Chrome to hand off its active URL to other devices."

components/handoff/handoff_manager.mm

-// 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.
-
-#include "components/handoff/handoff_manager.h"
-
-#include "base/logging.h"
-#include "base/mac/objc_property_releaser.h"
-#include "base/mac/scoped_nsobject.h"
-#include "components/handoff/handoff_utility.h"
-#include "net/base/mac/url_conversions.h"
-#include "url/gurl.h"
-
-#if defined(OS_IOS)
-#include "base/ios/ios_util.h"
-#endif
-
-#if defined(OS_MACOSX) && !defined(OS_IOS)
-#include "base/mac/mac_util.h"
-#include "base/mac/sdk_forward_declarations.h"
-#endif
-
-@interface HandoffManager () {
-  base::mac::ObjCPropertyReleaser _propertyReleaser_HandoffManager;
-
-  GURL _activeURL;
-}
-
-// The active user activity.
-@property(nonatomic, retain) NSUserActivity* userActivity;
-
-// Whether the URL of the current tab should be exposed for Handoff.
-- (BOOL)shouldUseActiveURL;
-
-// Updates the active NSUserActivity.
-- (void)updateUserActivity;
-
-@end
-
-@implementation HandoffManager
-
-@synthesize userActivity = _userActivity;
-
-- (instancetype)init {
-  self = [super init];
-  if (self) {
-    _propertyReleaser_HandoffManager.Init(self, [HandoffManager class]);
-  }
-  return self;
-}
-
-- (void)updateActiveURL:(const GURL&)url {
-#if defined(OS_IOS)
-  // Handoff is only available on iOS 8+.
-  DCHECK(base::ios::IsRunningOnIOS8OrLater());
-#endif
-
-#if defined(OS_MACOSX) && !defined(OS_IOS)
-  // Handoff is only available on OSX 10.10+.
-  DCHECK(base::mac::IsOSYosemiteOrLater());
-#endif
-
-  _activeURL = url;
-  [self updateUserActivity];
-}
-
-- (BOOL)shouldUseActiveURL {
-  return _activeURL.SchemeIsHTTPOrHTTPS();
-}
-
-- (void)updateUserActivity {
-  // Clear the user activity.
-  if (![self shouldUseActiveURL]) {
-    [self.userActivity invalidate];
-    self.userActivity = nil;
-    return;
-  }
-
-  // No change to the user activity.
-  const GURL userActivityURL(net::GURLWithNSURL(self.userActivity.webpageURL));
-  if (userActivityURL == _activeURL)
-    return;
-
-  // Invalidate the old user activity and make a new one.
-  [self.userActivity invalidate];
-
-  Class aClass = NSClassFromString(@"NSUserActivity");
-  NSUserActivity* userActivity = [[aClass performSelector:@selector(alloc)]
-      performSelector:@selector(initWithActivityType:)
-           withObject:handoff::kChromeHandoffActivityType];
-  self.userActivity = base::scoped_nsobject<NSUserActivity>(userActivity);
-  self.userActivity.webpageURL = net::NSURLWithGURL(_activeURL);
-  self.userActivity.userInfo = @{ handoff::kOriginKey : handoff::kOriginiOS };
-  [self.userActivity becomeCurrent];
-}
-
-@end