Alternate NTP: Don't hide bookmark bar on instant

chrome/browser/ui/cocoa/tab_contents/previewable_contents_controller.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_PREVIEWABLE_CONTENTS_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_PREVIEWABLE_CONTENTS_CONTROLLER_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/memory/scoped_nsobject.h"
@@ skipping 33 matching lines @@
   // The desired height of the preview and units.
   CGFloat previewHeight_;
   InstantSizeUnits previewHeightUnits_;
 
   // If true then a shadow is drawn below the preview. This is used to make
   // instant omnibox "float" over the tab's web contents.
   BOOL drawDropShadow_;
 
   // View responsible for drawing a drop shadow.
   scoped_nsobject<NSView> dropShadowView_;
+
+  BrowserWindowController* windowController_;
+
+  // The vertical offset between the top of the view and the preview contents.
+  // This is used to push the preview contents below the bookmark bar. Normally
+  // this is 0 so that the preview contents obscures the bookmark bar.
+  CGFloat previewOffset_;
+
+  // The vertical offset between the top of the view and the active container.
+  // This is used to push the active container below the bookmark bar. Normally
+  // this is set to the height of the bookmark bar so that the bookmark bar is
+  // not obscured.
+  CGFloat activeContainerOffset_;
 }
 
 @property(readonly, nonatomic) NSView* activeContainer;
 @property(readonly, nonatomic) NSView* dropShadowView;
 @property(readonly, nonatomic) BOOL drawDropShadow;
+@property(assign, nonatomic) CGFloat previewOffset;
+@property(assign, nonatomic) CGFloat activeContainerOffset;
 
 // Initialization.
 - (id)initWithBrowser:(Browser*)browser
      windowController:(BrowserWindowController*)windowController;
 
 // Sets the current preview and installs its WebContentsView into the view
 // hierarchy.  Hides the active view.  |preview| must not be NULL.
 - (void)showPreview:(content::WebContents*)preview
              height:(CGFloat)height
         heightUnits:(InstantSizeUnits)heightUnits
      drawDropShadow:(BOOL)drawDropShadow;
 
 // Closes the current preview and shows the active view.
 - (void)hidePreview;
 
 // Called when a tab with |contents| is activated, so that we can check to see
 // if it's the preview being activated (and adjust internal state accordingly).
 - (void)onActivateTabWithContents:(content::WebContents*)contents;
 
+// Returns YES if the preview contents is currently showing.
+- (BOOL)isShowingPreview;
+
 - (InstantPreviewControllerMac*)instantPreviewController;
 
 @end
 
 #endif  // CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_PREVIEWABLE_CONTENTS_CONTROLLER_H_