Add more flexible handling of what is considered a google home page.

chrome/browser/google/google_util.h

Index: chrome/browser/google/google_util.h
===================================================================
--- chrome/browser/google/google_util.h	(revision 111916)
+++ chrome/browser/google/google_util.h	(working copy)
@@ -38,6 +38,9 @@
 // install. Returns false if the information is not available.
 bool GetReactivationBrand(std::string* brand);
 
+// True if |url| represents a valid Google home page URL.
+bool IsGoogleHomePageUrl(const std::string& url);
+
 // True if a build is strictly organic, according to its brand code.
 bool IsOrganic(const std::string& brand);