Add chrome.webstore API methods to allow sites to see progress of installation

chrome/browser/extensions/api/webstore/webstore_api.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 CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_WEBSTORE_API_H_
+#define CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_WEBSTORE_API_H_
+
+#include <list>
+#include <string>
+
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
+#include "chrome/browser/extensions/install_observer.h"
+#include "extensions/browser/event_router.h"
+
+namespace base {
+class ListValue;
+}
+
+namespace content {
+class BrowserContext;
+}
+
+namespace ipc {
+class Sender;
+}
+
+namespace extensions {
+
+class ListenerSet;
+
+class WebstoreAPI : public ProfileKeyedAPI, public InstallObserver {
+ public:
+  explicit WebstoreAPI(content::BrowserContext* browser_context);
+  virtual ~WebstoreAPI();
+
+  static WebstoreAPI* Get(content::BrowserContext* browser_context);
+
+  // Called whenever an inline extension install is started. Examines
+  // |listener_mask| to determine if a download progress or install
+  // stage listener should be added.
+  // |routing_id| refers to the id to which we send any return messages;
+  // |ipc_sender| is the sender through which we send them (typically this
+  // is the TabHelper which started the inline install).
+  void OnInlineInstallStart(int routing_id,
+                            IPC::Sender* ipc_sender,
+                            const std::string& extension_id,
+                            int listener_mask);
+
+  // Called when an inline extension install finishes. Removes any listeners
+  // related to the |routing_id|-|extension_id| pair.
+  void OnInlineInstallFinished(int routing_id, const std::string& extension_id);
+
+  // ProfileKeyedAPI implementation.
+  static ProfileKeyedAPIFactory<WebstoreAPI>* GetFactoryInstance();
+
+ private:
+  friend class ProfileKeyedAPIFactory<WebstoreAPI>;
+
+  // A simple struct to hold our listeners' information for each observed
+  // install.
+  struct ObservedInstallInfo {
+    ObservedInstallInfo(int routing_id,
+                        const std::string& extension_id,
+                        IPC::Sender* ipc_sender);
+    ~ObservedInstallInfo();
+
+    int routing_id;
+    std::string extension_id;
+    IPC::Sender* ipc_sender;
+  };

[asargent_no_longer_on_chrome, 2014/03/03 18:49:08]

See if you can move this inner struct into the .cc file per:

http://dev.chromium.org/developers/coding-style/cpp-dos-and-donts#TOC-Move-in....

Alternatively, you could make it a top-level struct instead of an inner one,
forward declare it above in this file, and still push the definition into the
.cc file. 

[Devlin, 2014/03/03 21:15:13]

Cool; for some reason, I thought that you couldn't have containers of undefined
classes/structs.  Thanks. :)

+  typedef std::list<ObservedInstallInfo> ObservedInstallInfoList;
+
+  // Sends an installation stage update message if we are observing
+  // the extension's install.
+  void SendInstallMessageIfObserved(const std::string& extension_id,
+                                    const std::string& install_stage);
+
+  // Removes listeners for the given |extension_id|-|routing_id| pair from
+  // |listeners|.
+  void RemoveListeners(int routing_id,
+                       const std::string& extension_id,
+                       ObservedInstallInfoList* listeners);
+
+  // InstallObserver implementation.
+  virtual void OnBeginExtensionDownload(const std::string& extension_id)
+      OVERRIDE;
+  virtual void OnDownloadProgress(const std::string& extension_id,
+                                  int percent_downloaded) OVERRIDE;
+  virtual void OnBeginCrxInstall(const std::string& extension_id) OVERRIDE;
+
+  // BrowserContextKeyedService implementation.
+  virtual void Shutdown() OVERRIDE;
+
+  // ProfileKeyedAPI implementation.
+  static const char* service_name() { return "WebstoreAPI"; }
+  static const bool kServiceIsNULLWhileTesting = true;
+
+  ObservedInstallInfoList download_progress_listeners_;
+  ObservedInstallInfoList install_stage_listeners_;
+  content::BrowserContext* browser_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebstoreAPI);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_WEBSTORE_WEBSTORE_API_H_