Revert 283678 "Refactor code that defers extension background pa..."

trunk/src/extensions/browser/process_manager_delegate.h

-// Copyright 2014 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 EXTENSIONS_BROWSER_PROCESS_MANAGER_DELEGATE_H_
-#define EXTENSIONS_BROWSER_PROCESS_MANAGER_DELEGATE_H_
-
-namespace content {
-class BrowserContext;
-};
-
-namespace extensions {
-
-// Customization of ProcessManager for the extension system embedder.
-class ProcessManagerDelegate {
- public:
-  virtual ~ProcessManagerDelegate() {}
-
-  // Returns true if the embedder allows background pages for the given
-  // |context|.
-  virtual bool IsBackgroundPageAllowed(
-      content::BrowserContext* context) const = 0;
-
-  // Returns true if the embedder wishes to defer starting up the renderers for
-  // extension background pages. If the embedder returns true it must call
-  // ProcessManager::MaybeCreateStartupBackgroundHosts() when it is ready. See
-  // ChromeProcessManagerDelegate for examples of how this is useful.
-  virtual bool DeferCreatingStartupBackgroundHosts(
-      content::BrowserContext* context) const = 0;
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_BROWSER_PROCESS_MANAGER_DELEGATE_H_