Flatten down to a single toolbar per window, significantly simplifying the ta...

chrome/browser/cocoa/command_observer_bridge.mm

+// 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.
+
+#import "chrome/browser/cocoa/command_observer_bridge.h"
+
+CommandObserverBridge::CommandObserverBridge(
+    id<CommandObserverProtocol> observer, CommandUpdater* commands)
+        : observer_(observer), commands_(commands) {
+  DCHECK(observer_ && commands_);
+}
+
+CommandObserverBridge::~CommandObserverBridge() {
+  // Unregister the notifications
+  commands_->RemoveCommandObserver(this);
+}
+
+void CommandObserverBridge::ObserveCommand(int command) {
+  commands_->AddCommandObserver(command, this);
+}
+
+void CommandObserverBridge::EnabledStateChangedForCommand(int command,
+                                                          bool enabled) {
+  [observer_ enabledStateChangedForCommand:command
+                                   enabled:enabled ? YES : NO];
+}