Implement people search.

chrome/browser/ui/app_list/search/common/webservice_search_provider.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_UI_APP_LIST_SEARCH_COMMON_WEBSERVICE_SEARCH_PROVIDER_H_
 #define CHROME_BROWSER_UI_APP_LIST_SEARCH_COMMON_WEBSERVICE_SEARCH_PROVIDER_H_
 
 #include "base/callback_forward.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/ui/app_list/search/search_provider.h"
 
+class Profile;
+
 namespace app_list {
 
 // Helper class for webservice based searches.
 class WebserviceSearchProvider : public SearchProvider {
  public:
-  WebserviceSearchProvider();
+  explicit WebserviceSearchProvider(Profile* profile);
   virtual ~WebserviceSearchProvider();
 
+  // Validate the query for privacy and size.
+  bool IsValidQuery(const string16& query);
+
+  // Start a query with throttling enabled.
   void StartThrottledQuery(const base::Closure& start_query);
-  bool IsSensitiveInput(const string16& query);
 
   void set_use_throttling(bool use) { use_throttling_ = use; }
 
+ protected:
+  Profile* profile_;
+
  private:
+  bool IsSensitiveInput(const string16& query);
+
   // The timestamp when the last key event happened.
   base::Time last_keytyped_;
 
-  // The timer to throttle QPS to the webstore search .
+  // The timer to throttle QPS.
   base::OneShotTimer<WebserviceSearchProvider> query_throttler_;
 
   // The flag for tests. It prevents the throttling If set to false.
   bool use_throttling_;
 
   DISALLOW_COPY_AND_ASSIGN(WebserviceSearchProvider);
 };
 
 }  // namespace app_list
 
 #endif  // CHROME_BROWSER_UI_APP_LIST_SEARCH_COMMON_WEBSERVICE_SEARCH_PROVIDER_H_