Add a SafeSearch preference, policy and implementation.

chrome/browser/google/google_util.h

Index: chrome/browser/google/google_util.h
diff --git a/chrome/browser/google/google_util.h b/chrome/browser/google/google_util.h
index b398bfac8242d7c8d3174693ed976632a7632553..f4c4028481c55830377b46f8c91602f50e97eb06 100644
--- a/chrome/browser/google/google_util.h
+++ b/chrome/browser/google/google_util.h
@@ -95,6 +95,10 @@ 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 {