Add a SafeSearch preference, policy and implementation.

chrome/browser/google/google_util.h

 // Copyright (c) 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.
 //
 // Some Google related utility functions.
 
 #ifndef CHROME_BROWSER_GOOGLE_GOOGLE_UTIL_H__
 #define CHROME_BROWSER_GOOGLE_GOOGLE_UTIL_H__
 
 #include <string>
@@ skipping 77 matching lines @@
 bool IsOrganic(const std::string& brand);
 
 // True if a build should run as organic during first run. This uses
 // a slightly different set of brand codes from the standard IsOrganic
 // method.
 bool IsOrganicFirstRun(const std::string& brand);
 
 // True if |brand| is an internet cafe brand code.
 bool IsInternetCafeBrandCode(const std::string& brand);
 
+// A URL supports SafeSearch if it is either a Google Home Page URL or a Google
+// Search URL.

[Pam (message me for reviews), 2012/11/02 14:00:35]

This comment describes the implementation. More descriptive would be something
like

Returns true if the given url supports Google Safe Search parameters.

Granted this is a bit redundant with the method name, but not entirely.

[Sergiu, 2012/11/02 20:38:43]

Done.

+bool SupportsSafeSearch(const std::string& url);
+
 // This class is meant to be used only from test code, and sets the brand
 // code returned by the function GetBrand() above while the object exists.
 class BrandForTesting {
  public:
   explicit BrandForTesting(const std::string& brand);
   ~BrandForTesting();
 
  private:
   std::string brand_;
   DISALLOW_COPY_AND_ASSIGN(BrandForTesting);
 };
 
 }  // namespace google_util
 
 #endif  // CHROME_BROWSER_GOOGLE_GOOGLE_UTIL_H__