Revert 152080 - Refactor browser window zoom handling and enable zoom icon on all platforms.

chrome/browser/ui/cocoa/location_bar/zoom_decoration.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.
-
-#import "chrome/browser/ui/cocoa/location_bar/zoom_decoration.h"
-
-#include "base/string16.h"
-#include "base/string_number_conversions.h"
-#include "chrome/app/chrome_command_ids.h"
-#import "chrome/browser/ui/cocoa/omnibox/omnibox_view_mac.h"
-#include "chrome/browser/ui/toolbar/toolbar_model.h"
-#include "chrome/browser/ui/zoom/zoom_controller.h"
-#include "grit/generated_resources.h"
-#include "ui/base/l10n/l10n_util_mac.h"
-
-ZoomDecoration::ZoomDecoration(ToolbarModel* toolbar_model)
-    : toolbar_model_(toolbar_model) {
-  Update(NULL);
-}
-
-ZoomDecoration::~ZoomDecoration() {
-}
-
-void ZoomDecoration::Update(ZoomController* zoom_controller) {
-  if (!zoom_controller || zoom_controller->IsAtDefaultZoom() ||
-      toolbar_model_->input_in_progress()) {
-    // TODO(dbeam): hide zoom bubble when it exists.
-    SetVisible(false);
-    return;
-  }
-
-  SetImage(OmniboxViewMac::ImageForResource(
-      zoom_controller->GetResourceForZoomLevel()));
-
-  string16 zoom_percent = base::IntToString16(zoom_controller->zoom_percent());
-  NSString* zoom_string =
-      l10n_util::GetNSStringFWithFixup(IDS_TOOLTIP_ZOOM, zoom_percent);
-  tooltip_.reset([zoom_string retain]);
-
-  SetVisible(true);
-}
-
-bool ZoomDecoration::AcceptsMousePress() {
-  return true;
-}
-
-NSString* ZoomDecoration::GetToolTip() {
-  return tooltip_.get();
-}