Make some code gender neutral.

chrome/renderer/searchbox/searchbox_extension.cc

 // 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.
 
 #include "chrome/renderer/searchbox/searchbox_extension.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/command_line.h"
@@ skipping 392 matching lines @@
       v8::Isolate*,
       v8::Local<v8::String> name) override;
 
   // Helper function to find the RenderView. May return NULL.
   static content::RenderView* GetRenderView();
 
   // Sends a Chrome identity check to the browser.
   static void CheckIsUserSignedInToChromeAs(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
-  // Checks whether the user sync his history.
+  // Checks whether the user syncs their history.
   static void CheckIsUserSyncingHistory(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Deletes a Most Visited item.
   static void DeleteMostVisitedItem(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
   // Gets Most Visited Items.
   static void GetMostVisitedItems(
       const v8::FunctionCallbackInfo<v8::Value>& args);
@@ skipping 690 matching lines @@
     ThrowInvalidParameters(args);
     return;
   }
 
   DVLOG(1) << render_view << " UndoMostVisitedDeletion";
   SearchBox::Get(render_view)
       ->UndoMostVisitedDeletion(args[0]->ToInteger()->Value());
 }
 
 }  // namespace extensions_v8