Make several methods of TemplateUrlService const

components/search_engines/template_url_service.h

Index: components/search_engines/template_url_service.h
diff --git a/components/search_engines/template_url_service.h b/components/search_engines/template_url_service.h
index b6bb73ba756d105b27c0ee507d6200176a40e3f3..4187327f06a21b14b590b8a7e0b5a6d5b9c30147 100644
--- a/components/search_engines/template_url_service.h
+++ b/components/search_engines/template_url_service.h
@@ -135,14 +135,14 @@ class TemplateURLService : public WebDataServiceConsumer,
 
   // Returns whether the engine is a "pre-existing" engine, either from the
   // prepopulate list or created by policy.
-  bool IsPrepopulatedOrCreatedByPolicy(const TemplateURL* template_url);
+  bool IsPrepopulatedOrCreatedByPolicy(const TemplateURL* template_url) const;
 
   // Returns whether |template_url| should be shown in the list of engines
   // most likely to be selected as a default engine. This is meant to highlight
   // the current default, as well as the other most likely choices of default
   // engine, separately from a full list of all TemplateURLs (which might be
   // very long).
-  bool ShowInDefaultList(const TemplateURL* template_url);
+  bool ShowInDefaultList(const TemplateURL* template_url) const;
 
   // Adds to |matches| all TemplateURLs whose keywords begin with |prefix|,
   // sorted shortest-keyword-first. If |supports_replacement_only| is true, only
@@ -248,7 +248,7 @@ class TemplateURLService : public WebDataServiceConsumer,
   // Return true if the given |url| can be made the default. This returns false
   // regardless of |url| if the default search provider is managed by policy or
   // controlled by an extension.
-  bool CanMakeDefault(const TemplateURL* url);
+  bool CanMakeDefault(const TemplateURL* url) const;
 
   // Set the default search provider.  |url| may be null.
   // This will assert if the default search is managed; the UI should not be
@@ -274,7 +274,7 @@ class TemplateURLService : public WebDataServiceConsumer,
   }
 
   // Returns true if the default search provider is controlled by an extension.
-  bool IsExtensionControlledDefaultSearch();
+  bool IsExtensionControlledDefaultSearch() const;
 
   // Returns the default search specified in the prepopulated data, if it
   // exists.  If not, returns first URL in |template_urls_|, or NULL if that's
@@ -330,8 +330,9 @@ class TemplateURLService : public WebDataServiceConsumer,
   // Returns the locale-direction-adjusted short name for the given keyword.
   // Also sets the out param to indicate whether the keyword belongs to an
   // Omnibox extension.
-  base::string16 GetKeywordShortName(const base::string16& keyword,
-                                     bool* is_omnibox_api_extension_keyword);
+  base::string16 GetKeywordShortName(
+      const base::string16& keyword,
+      bool* is_omnibox_api_extension_keyword) const;
 
   // Called by the history service when a URL is visited.
   void OnHistoryURLVisited(const URLVisitedDetails& details);
@@ -543,13 +544,13 @@ class TemplateURLService : public WebDataServiceConsumer,
 
   // Returns false if there is a TemplateURL that has a search url with the
   // specified host and that TemplateURL has been manually modified.
-  bool CanAddAutogeneratedKeywordForHost(const std::string& host);
+  bool CanAddAutogeneratedKeywordForHost(const std::string& host) const;
 
   // Returns true if the TemplateURL is replaceable. This doesn't look at the
   // uniqueness of the keyword or host and is intended to be called after those
   // checks have been done. This returns true if the TemplateURL doesn't appear
   // in the default list and is marked as safe_for_autoreplace.
-  bool CanReplace(const TemplateURL* t_url);
+  bool CanReplace(const TemplateURL* t_url) const;
 
   // Like GetTemplateURLForKeyword(), but ignores extension-provided keywords.
   TemplateURL* FindNonExtensionTemplateURLForKeyword(
@@ -661,7 +662,7 @@ class TemplateURLService : public WebDataServiceConsumer,
   //    search provider
   bool IsLocalTemplateURLBetter(const TemplateURL* local_turl,
                                 const TemplateURL* sync_turl,
-                                bool prefer_local_default = true);
+                                bool prefer_local_default = true) const;
 
   // Given two synced TemplateURLs with a conflicting keyword, one of which
   // needs to be added to or updated in the local model (|unapplied_sync_turl|)