Linux: implement Page Actions support.

chrome/browser/extensions/extensions_service.h

 // Copyright (c) 2009 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_EXTENSIONS_EXTENSIONS_SERVICE_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 84 matching lines @@
   const FilePath& install_directory() const { return install_directory_; }
 
   // Initialize and start all installed extensions.
   void Init();
 
   // Look up an extension by ID.
   Extension* GetExtensionById(const std::string& id) {
     return GetExtensionByIdInternal(id, true, false);
   }
 
+  // Retrieves a vector of all page actions, irrespective of which
+  // extension they belong to.
+  std::vector<PageAction*> GetPageActions() const;
+
   // Install the extension file at |extension_path|.  Will install as an
   // update if an older version is already installed.
   // For fresh installs, this method also causes the extension to be
   // immediately loaded.
   // TODO(aa): This method can be removed. It is only used by the unit tests,
   // and they could use CrxInstaller directly instead.
   void InstallExtension(const FilePath& extension_path);
 
   // Updates a currently-installed extension with the contents from
   // |extension_path|.
@@ skipping 246 matching lines @@
 
   // A map of all external extension providers.
   typedef std::map<Extension::Location,
                    linked_ptr<ExternalExtensionProvider> > ProviderMap;
   ProviderMap external_extension_providers_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionsServiceBackend);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSIONS_SERVICE_H_