Add core plumbing for Instant Extended work

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__
 #pragma once
 
@@ skipping 48 matching lines @@
 // "*.google.<TLD>" instead.
 bool IsGoogleDomainUrl(const std::string& url, SubdomainPermission permission);
 // True if |host| is "[www.]google.<TLD>" with a valid TLD. If
 // |permission| is ALLOW_SUBDOMAIN, we check against host "*.google.<TLD>"
 // instead.
 bool IsGoogleHostname(const std::string& host, SubdomainPermission permission);
 // True if |url| represents a valid Google home page URL.
 bool IsGoogleHomePageUrl(const std::string& url);
 // True if |url| represents a valid Google search URL.
 bool IsGoogleSearchUrl(const std::string& url);
+// True if |url| represents a valid Google search URL used by the Instant
+// Extended API.
+bool IsInstantExtendedAPIGoogleSearchUrl(const std::string& url);
 
 // True if a build is strictly organic, according to its brand code.
 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);
 
 // 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__