Mac bookmark work. ...

chrome/browser/cocoa/bookmark_bar_state_controller.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/bookmark_bar_state_controller.h"
+#import "chrome/browser/bookmarks/bookmark_utils.h"
+#import "chrome/browser/browser.h"
+
+
+@implementation BookmarkBarStateController
+
+- (id)initWithBrowser:(Browser *)browser {
+  if ((self = [super init])) {
+    browser_ = browser;
+    // Initial visibility state comes from our preference.
+    if (browser_->profile()->GetPrefs()->GetBoolean(prefs::kShowBookmarkBar)) {
+      visible_ = YES;
+    }
+  }
+  return self;
+}
+
+- (BOOL)visible {
+  return visible_;
+}
+
+// Whack and save a preference change.  On Windows this call
+// is made from BookmarkBarView.
+- (void)togglePreference {
+  bookmark_utils::ToggleWhenVisible(browser_->profile());
+}
+
+- (void)toggleBookmarkBar {
+  visible_ = visible_ ? NO : YES;
+  [self togglePreference];
+}
+
+@end  // BookmarkBarStateController