Refactor renderer-side script injection

extensions/renderer/user_script_slave.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_RENDERER_USER_SCRIPT_SLAVE_H_
-#define EXTENSIONS_RENDERER_USER_SCRIPT_SLAVE_H_
-
-#include <map>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/memory/linked_ptr.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "base/memory/shared_memory.h"
-#include "base/strings/string_piece.h"
-#include "extensions/common/user_script.h"
-#include "extensions/renderer/script_injection.h"
-#include "third_party/WebKit/public/platform/WebString.h"
-
-class GURL;
-
-namespace blink {
-class WebFrame;
-}
-
-namespace content {
-class RenderView;
-}
-
-namespace extensions {
-class Extension;
-class ExtensionSet;
-
-// Manages installed UserScripts for a render process.
-class UserScriptSlave {
- public:
-  explicit UserScriptSlave(const ExtensionSet* extensions);
-  ~UserScriptSlave();
-
-  // Returns the unique set of extension IDs this UserScriptSlave knows about.
-  void GetActiveExtensions(std::set<std::string>* extension_ids);
-
-  // Gets the extension with the given |id|, if one exists.
-  const Extension* GetExtension(const std::string& extension_id);
-
-  // Update the parsed scripts from shared memory.
-  // If |changed_extensions| is not empty, only those extensions will be
-  // updated.
-  // Otherwise, all extensions will be updated.
-  bool UpdateScripts(base::SharedMemoryHandle shared_memory,
-                     const std::set<std::string>& changed_extensions);
-
-  // Gets the isolated world ID to use for the given |extension| in the given
-  // |frame|. If no isolated world has been created for that extension,
-  // one will be created and initialized.
-  int GetIsolatedWorldIdForExtension(const Extension* extension,
-                                     blink::WebFrame* frame);
-
-  // Gets the id of the extension running in a given isolated world. If no such
-  // isolated world exists, or no extension is running in it, returns empty
-  // string.
-  std::string GetExtensionIdForIsolatedWorld(int isolated_world_id);
-
-  void RemoveIsolatedWorld(const std::string& extension_id);
-
-  // Inject the appropriate scripts into a frame based on its URL.
-  // TODO(aa): Extract a UserScriptFrame interface out of this to improve
-  // testability.
-  void InjectScripts(blink::WebFrame* frame, UserScript::RunLocation location);
-
-  // Allow an extension to inject scripts that were previously delayed for user
-  // approval.
-  void OnContentScriptGrantedPermission(
-      content::RenderView* render_view, int request_id);
-
-  // Notify the UserScriptSlave that the |frame| is detached, and about to die.
-  void FrameDetached(blink::WebFrame* frame);
-
- private:
-  // Log the data from scripts being run, including doing UMA and notifying the
-  // browser.
-  void LogScriptsRun(blink::WebFrame* frame,
-                     UserScript::RunLocation location,
-                     const ScriptInjection::ScriptsRunInfo& info);
-
-  // Shared memory containing raw script data.
-  scoped_ptr<base::SharedMemory> shared_memory_;
-
-  // Parsed script data, ready to inject.
-  ScopedVector<ScriptInjection> script_injections_;
-
-  // Extension metadata.
-  const ExtensionSet* extensions_;
-
-  typedef std::map<std::string, int> IsolatedWorldMap;
-  IsolatedWorldMap isolated_world_ids_;
-
-  DISALLOW_COPY_AND_ASSIGN(UserScriptSlave);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_RENDERER_USER_SCRIPT_SLAVE_H_