Add support for time based deletion of browsing data on iOS

ios/chrome/browser/ui/commands/clear_browsing_data_command.mm

 // Copyright 2012 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.
 
 #import "ios/chrome/browser/ui/commands/clear_browsing_data_command.h"
 
 #include "base/logging.h"
 #include "ios/chrome/browser/ui/commands/ios_command_ids.h"
 
 @implementation ClearBrowsingDataCommand
 
 @synthesize browserState = _browserState;
 @synthesize mask = _mask;
+@synthesize timePeriod = _timePeriod;
 
 - (instancetype)initWithTag:(NSInteger)tag {
   NOTREACHED();
   return nil;
 }
 
 - (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
+                                mask:(int)mask
+                          timePeriod:(browsing_data::TimePeriod)timePeriod {
+  self = [super initWithTag:IDC_CLEAR_BROWSING_DATA_IOS];
+  if (self) {
+    DCHECK(browserState);
+    _browserState = browserState;
+    _mask = mask;
+    _timePeriod = timePeriod;
+  }
+  return self;
+}
+
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState

[msramek, 2016/08/29 14:20:59]

Shouldn't we explicitly initialize _timePeriod to all time here?

[ioanap, 2016/08/30 11:32:08]

Done.

                                 mask:(int)mask {
   self = [super initWithTag:IDC_CLEAR_BROWSING_DATA_IOS];
   if (self) {
     DCHECK(browserState);
     _browserState = browserState;
     _mask = mask;
   }
   return self;
 }
 
 @end