Refactor browser window zoom handling and enable zoom icon on all platforms.

chrome/browser/ui/cocoa/browser_window_cocoa.mm

 // 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/ui/cocoa/browser_window_cocoa.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/mac/mac_util.h"
@@ skipping 231 matching lines @@
 }
 
 void BrowserWindowCocoa::UpdateLoadingAnimations(bool should_animate) {
   // Do nothing on Mac.
 }
 
 void BrowserWindowCocoa::SetStarredState(bool is_starred) {
   [controller_ setStarredState:is_starred ? YES : NO];
 }
 
-void BrowserWindowCocoa::SetZoomIconState(ZoomController::ZoomIconState state) {
-  // TODO(khorimoto): Find someone to implement this.
-}
-
-void BrowserWindowCocoa::SetZoomIconTooltipPercent(int zoom_percent) {
-  // TODO(khorimoto): Find someone to implement this.
-}
-
-void BrowserWindowCocoa::ShowZoomBubble(int zoom_percent) {
-  // TODO(khorimoto): Find someone to implement this.
+void BrowserWindowCocoa::ZoomChangedForActiveTab(bool can_show_bubble) {
+  [controller_ zoomChangedForActiveTab:can_show_bubble ? YES : NO];
 }
 
 gfx::Rect BrowserWindowCocoa::GetRestoredBounds() const {
   // Flip coordinates based on the primary screen.
   NSScreen* screen = [[NSScreen screens] objectAtIndex:0];
   NSRect frame = [controller_ regularWindowFrame];
   gfx::Rect bounds(frame.origin.x, 0, NSWidth(frame), NSHeight(frame));
   bounds.set_y(NSHeight([screen frame]) - NSMaxY(frame));
   return bounds;
 }
@@ skipping 369 matching lines @@
   AvatarMenuBubbleController* menu =
       [[AvatarMenuBubbleController alloc] initWithBrowser:browser_
                                                anchoredAt:point];
   [[menu bubble] setAlignment:info_bubble::kAlignEdgeToAnchorEdge];
   [menu showWindow:nil];
 }
 
 void BrowserWindowCocoa::ShowAvatarBubbleFromAvatarButton() {
   [[controller_ avatarButtonController] showAvatarBubble];
 }