Adds InstantExtendedEnabledParam to the search request URL iff the query extraction flag is enabled.

chrome/browser/search_engines/search_terms_data.h

Index: chrome/browser/search_engines/search_terms_data.h
diff --git a/chrome/browser/search_engines/search_terms_data.h b/chrome/browser/search_engines/search_terms_data.h
index afa09d890c6590099e172254b908f2c005e6bcca..28f45727a371ed08cc4dfecb4380f2c73a5bb19e 100644
--- a/chrome/browser/search_engines/search_terms_data.h
+++ b/chrome/browser/search_engines/search_terms_data.h
@@ -61,12 +61,6 @@ class SearchTermsData {
   // the returned string to be non-empty.
   virtual std::string ForceInstantResultsParam(bool for_prerender) const;
 
-  // Returns a string indicating whether InstantExtended is enabled, suitable
-  // for adding as a query string param to the homepage or search requests.
-  // Returns an empty string otherwise.  Determining this requires accessing the
-  // Profile, so this can only ever be non-empty for UIThreadSearchTermsData.
-  virtual std::string InstantExtendedEnabledParam() const;
-
   // Returns a string indicating whether a non-default theme is active,
   // suitable for adding as a query string param to the homepage.  This only
   // applies if Instant Extended is enabled.  Returns an empty string otherwise.
@@ -82,8 +76,7 @@ class SearchTermsData {
 class UIThreadSearchTermsData : public SearchTermsData {
  public:
   // If |profile_| is NULL, the Google base URL accessors will return default
-  // values, and ForceInstantResultsParam(), InstantExtendedEnabledParam(), and
-  // NTPIsThemedParam(), will return the empty string.
+  // values, and NTPIsThemedParam() will return an empty string.
   explicit UIThreadSearchTermsData(Profile* profile);
 
   virtual std::string GoogleBaseURLValue() const OVERRIDE;
@@ -94,7 +87,6 @@ class UIThreadSearchTermsData : public SearchTermsData {
   virtual std::string GetSuggestRequestIdentifier() const OVERRIDE;
   virtual std::string ForceInstantResultsParam(
       bool for_prerender) const OVERRIDE;
-  virtual std::string InstantExtendedEnabledParam() const OVERRIDE;
   virtual std::string NTPIsThemedParam() const OVERRIDE;
 
   // Used by tests to override the value for the Google base URL.  Passing the