Support chrome.windows extension API events for browserless Panels.

chrome/browser/extensions/window_controller_list.cc

 // 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.
 
 #include "chrome/browser/extensions/window_controller_list.h"
 
 #include <algorithm>
 
 #include "chrome/browser/extensions/extension_function.h"
+#include "chrome/browser/extensions/window_controller_list_observer.h"
 #include "chrome/browser/sessions/session_id.h"
 #include "chrome/browser/ui/base_window.h"
 
 namespace extensions {
 
 ///////////////////////////////////////////////////////////////////////////////
 // WindowControllerList
 
 // static
 WindowControllerList* WindowControllerList::GetInstance() {
   return Singleton<WindowControllerList>::get();
 }
 
 WindowControllerList::WindowControllerList() {
 }
 
 WindowControllerList::~WindowControllerList() {
 }
 
 void WindowControllerList::AddExtensionWindow(WindowController* window) {
   windows_.push_back(window);
+  FOR_EACH_OBSERVER(WindowControllerListObserver, observers_,
+                    OnWindowControllerAdded(window));
 }
 
 void WindowControllerList::RemoveExtensionWindow(WindowController* window) {
   ControllerList::iterator iter = std::find(
       windows_.begin(), windows_.end(), window);
-  if (iter != windows_.end())
+  if (iter != windows_.end()) {
     windows_.erase(iter);
+    FOR_EACH_OBSERVER(WindowControllerListObserver, observers_,
+                      OnWindowControllerRemoved(window));
+  }
+}
+
+void WindowControllerList::AddObserver(WindowControllerListObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void WindowControllerList::RemoveObserver(
+    WindowControllerListObserver* observer) {
+  observers_.RemoveObserver(observer);
 }
 
 WindowController* WindowControllerList::FindWindowForFunctionById(
     const UIThreadExtensionFunction* function,
     int id) const {
   for (ControllerList::const_iterator iter = windows().begin();
        iter != windows().end(); ++iter) {
     if (function->CanOperateOnWindow(*iter) && (*iter)->GetWindowId() == id)
       return *iter;
   }
   return NULL;
 }
 
 WindowController* WindowControllerList::CurrentWindowForFunction(
     const UIThreadExtensionFunction* function) const {
   WindowController* result = NULL;
   // Returns either the focused window (if any), or the last window in the list.
   for (ControllerList::const_iterator iter = windows().begin();
        iter != windows().end(); ++iter) {
     if (function->CanOperateOnWindow(*iter)) {
       result = *iter;
       if (result->window()->IsActive())
         break;  // use focused window
     }
   }
   return result;
 }
 
 }  // namespace extensions