First pass at experimental omnibox API. There are plenty of rough edges and

chrome/browser/search_engines/template_url_model.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
 #ifndef CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_MODEL_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_MODEL_H_
 
 #include <set>
 
 #include "base/observer_list.h"
 #include "base/scoped_ptr.h"
 #include "chrome/browser/webdata/web_data_service.h"
 #include "chrome/common/notification_registrar.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
+class Extension;
 class PrefService;
 class Profile;
 
 namespace history {
 struct URLVisitedDetails;
 }
 
 // TemplateURLModel is the backend for keywords. It's used by
 // KeywordAutocomplete.
 //
@@ skipping 103 matching lines @@
   // existing_turl. If existing_turl was the default, new_turl is made the
   // default. After this call existing_turl is deleted. As with Add,
   // TemplateURLModel takes ownership of existing_turl.
   void Replace(const TemplateURL* existing_turl,
                TemplateURL* new_turl);
 
   // Removes all auto-generated keywords that were created on or after the
   // date passed in.
   void RemoveAutoGeneratedSince(base::Time created_after);
 
+  // If the given extension has an omnibox keyword, adds a TemplateURL for that
+  // keyword. Only 1 keyword is allowed for a given extension. If the keyword
+  // already exists for this extension, does nothing.
+  void RegisterExtensionKeyword(Extension* extension);
+
+  // Removes the TemplateURL containing the keyword for the given extension,
+  // if any.
+  void UnregisterExtensionKeyword(Extension* extension);
+
+  // Returns the TemplateURL associated with the keyword for this extension.
+  // This works by checking the extension ID, not the keyword, so it will work
+  // even if the user changed the keyword.
+  const TemplateURL* GetTemplateURLForExtension(Extension* extension) const;
+
   // Returns the set of URLs describing the keywords. The elements are owned
   // by TemplateURLModel and should not be deleted.
   std::vector<const TemplateURL*> GetTemplateURLs() const;
 
   // Increment the usage count of a keyword.
   // Called when a URL is loaded that was generated from a keyword.
   void IncrementUsageCount(const TemplateURL* url);
 
   // Resets the title, keyword and search url of the specified TemplateURL.
   // The TemplateURL is marked as not replaceable.
@@ skipping 30 matching lines @@
   // invoked.
   virtual void OnWebDataServiceRequestDone(WebDataService::Handle h,
                                            const WDTypedResult* result);
 
   // Removes (and deletes) TemplateURLs from |urls| that have duplicate
   // prepopulate ids. Duplicate prepopulate ids are not allowed, but due to a
   // bug it was possible get dups. This step is only called when the version
   // number changes.
   void RemoveDuplicatePrepopulateIDs(std::vector<const TemplateURL*>* urls);
 
+  // Returns the locale-direction-adjusted short name for the given keyword.
+  // Also sets the out param to indicate whether the keyword belongs to an
+  // extension.
+  std::wstring GetKeywordShortName(const std::wstring& keyword,
+                                   bool* is_extension_keyword);
+
   // NotificationObserver method. TemplateURLModel listens for three
   // notification types:
   // . NOTIFY_HISTORY_URL_VISITED: adds keyword search terms if the visit
   //   corresponds to a keyword.
   // . NOTIFY_GOOGLE_URL_UPDATED: updates mapping for any keywords containing
   //   a google base url replacement term.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
@@ skipping 145 matching lines @@
 
   // The default search provider from preferences. This is only valid if
   // GetDefaultSearchProvider is invoked and we haven't been loaded or loading
   // failed. If loading was successful this is not used.
   scoped_ptr<TemplateURL> prefs_default_search_provider_;
 
   // ID assigned to next TemplateURL added to this model. This is an ever
   // increasing integer that is initialized from the database.
   TemplateURL::IDType next_id_;
 
+  // List of extension IDs waiting for Load to have keywords registered.
+  std::vector<std::string> pending_extension_ids_;
+
   DISALLOW_EVIL_CONSTRUCTORS(TemplateURLModel);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_MODEL_H_