Remove EPM:all_hosts_ and use all_extension_views_ instead.

chrome/browser/extensions/extension_browsertest.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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_
 #pragma once
 
 #include <string>
 
@@ skipping 150 matching lines @@
                                             const FilePath& path,
                                             InstallUIType ui_type,
                                             int expected_change);
   const Extension* InstallOrUpdateExtension(const std::string& id,
                                             const FilePath& path,
                                             InstallUIType ui_type,
                                             int expected_change,
                                             Profile* profile,
                                             bool from_webstore);
 
-  bool WaitForExtensionHostsToLoad();
+  bool WaitForExtensionViewsToLoad();
 
   // When waiting for page action count to change, we wait until it reaches this
   // value.
   int target_page_action_count_;
 
   // When waiting for visible page action count to change, we wait until it
   // reaches this value.
   int target_visible_page_action_count_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSERTEST_H_