Implements the "Set to default" button on the zoom bubble.

chrome/browser/ui/views/location_bar/location_bar_view.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/ui/views/location_bar/location_bar_view.h"
 
 #include <algorithm>
 #include <map>
 
 #include "base/stl_util.h"
@@ skipping 252 matching lines @@
   keyword_hint_view_->SetFont(font_);
 
   for (int i = 0; i < CONTENT_SETTINGS_NUM_TYPES; ++i) {
     ContentSettingImageView* content_blocked_view =
         new ContentSettingImageView(static_cast<ContentSettingsType>(i), this);
     content_setting_views_.push_back(content_blocked_view);
     AddChildView(content_blocked_view);
     content_blocked_view->SetVisible(false);
   }
 
-  zoom_view_ = new ZoomView(model_);
+  // Create the zoom view. At this point, |delegate_| has not yet been assigned
+  // a TabContents, so calling GetTabContents() will just return NULL. Thus,
+  // |delegate_| itself is passed here, where it can be queried at a later time
+  // for the appropriate TabContents.
+  zoom_view_ = new ZoomView(model_, delegate_);
   AddChildView(zoom_view_);
 
   if (extensions::switch_utils::IsActionBoxEnabled()) {
     action_box_button_view_ = new ActionBoxButtonView(
         extensions::ExtensionSystem::Get(profile_)->extension_service());
     AddChildView(action_box_button_view_);
   } else if (browser_defaults::bookmarks_enabled && (mode_ == NORMAL)) {
     // Note: condition above means that the star and ChromeToMobile icons are
     // hidden in popups and in the app launcher.
     star_view_ = new StarView(command_updater_);
@@ skipping 224 matching lines @@
 
 void LocationBarView::SetZoomIconState(
     ZoomController::ZoomIconState zoom_icon_state) {
   zoom_view_->SetZoomIconState(zoom_icon_state);
 
   Layout();
   SchedulePaint();
 }
 
 void LocationBarView::ShowZoomBubble(int zoom_percent) {
-  ZoomBubbleView::ShowBubble(zoom_view_, zoom_percent, true);
+  ZoomBubbleView::ShowBubble(zoom_view_, GetTabContents(), true);
 }
 
 void LocationBarView::ShowChromeToMobileBubble() {
   Browser* browser = GetBrowserFromDelegate(delegate_);
   chrome::ShowChromeToMobileBubbleView(chrome_to_mobile_view_, browser);
 }
 
 gfx::Point LocationBarView::GetLocationEntryOrigin() const {
   gfx::Point origin(location_entry_view_->bounds().origin());
   // If the UI layout is RTL, the coordinate system is not transformed and
@@ skipping 962 matching lines @@
 }
 
 void LocationBarView::CleanupFadeAnimation() {
   // Since we're no longer animating we don't need our layer.
   SetPaintToLayer(false);
   // Bubble labels don't need a transparent background anymore.
   ev_bubble_view_->SetLabelBackgroundColor(SK_ColorWHITE);
   selected_keyword_view_->SetLabelBackgroundColor(SK_ColorWHITE);
 }
 #endif  // USE_AURA