Exposes a chrome.devtools object to extensions. This allows extensions to call chrome.devtools.connect() to open up a Port by which it can receive devtools messages to implement the proposed perf trace extensions API documented here:

http://code.google.com/p/chromium/wiki/ExtensionsPerfTraceAPI

Review URL: http://codereview.chromium.org/159882

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@24158 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 63 insertions, 0 deletions

diff --git a/chrome/browser/extensions/extension_devtools_manager.h b/chrome/browser/extensions/extension_devtools_manager.h
new file mode 100644
index 0000000..35e7cec
--- /dev/null
+++ b/chrome/browser/extensions/extension_devtools_manager.h
@@ -0,0 +1,63 @@
+// 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_EXTENSION_DEVTOOLS_MANAGER_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_DEVTOOLS_MANAGER_H_
+
+#include <map>
+#include <set>
+#include <string>
+#include "base/linked_ptr.h"
+#include "base/ref_counted.h"
+
+class ExtensionDevToolsBridge;
+class MessageLoop;
+class Profile;
+
+// This class manages the lifetimes of ExtensionDevToolsBridge objects.
+// The manager is owned by the Profile.
+//
+// The lifetime of an ExtensionDevToolsBridge object is determined by:
+//  * the existence of registered event handlers for the bridge's tab
+//  * the lifetime of the inspected tab
+//
+// The manager is alerted whenever an event listener is added or removed and
+// keeps track of the set of renderers with event listeners registered for each
+// tab.  A new bridge object is created for a tab when the first event listener
+// is registered on that tab.  A bridge object is destroyed when all event
+// listeners are removed, the inspected tab closes, or when the manager itself
+// is destroyed.
+
+class ExtensionDevToolsManager
+    : public base::RefCountedThreadSafe<ExtensionDevToolsManager> {
+ public:
+  // UI thread only:
+  explicit ExtensionDevToolsManager(Profile* profile);
+  ~ExtensionDevToolsManager();
+
+  void AddEventListener(const std::string& event_name,
+                        int render_process_id);
+
+  void RemoveEventListener(const std::string& event_name,
+                           int render_process_id);
+
+  void BridgeClosingForTab(int tab_id);
+
+ private:
+
+  // Map of tab IDs to the ExtensionDevToolsBridge connected to the tab
+  std::map<int, linked_ptr<ExtensionDevToolsBridge> > tab_id_to_bridge_;
+
+  // Map of tab IDs to the set of render_process_ids that have registered
+  // event handlers for the tab.
+  std::map<int, std::set<int> > tab_id_to_render_process_ids_;
+
+  Profile* profile_;
+  MessageLoop* ui_loop_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionDevToolsManager);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_DEVTOOLS_MANAGER_H_
+