Upstream Chrome on iOS source code [6/11].

ios/chrome/browser/ui/ntp/new_tab_page_header_view.h

+// Copyright 2014 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 IOS_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HEADER_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HEADER_VIEW_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/ui/toolbar/toolbar_owner.h"
+
+@protocol OmniboxFocuser;
+@class TabModel;
+@protocol WebToolbarDelegate;
+
+class ReadingListModel;
+
+// Header view for the Material Design NTP. The header view contains all views
+// that are displayed above the list of most visited sites, which includes the
+// toolbar buttons, Google doodle, and fake omnibox.
+@interface NewTabPageHeaderView : UICollectionReusableView<ToolbarOwner>
+
+// Return the toolbar view;
+@property(nonatomic, readonly) UIView* toolBarView;
+
+// Creates a NewTabPageToolbarController using the given |toolbarDelegate|,
+// |focuser| and |readingListModel|, and adds the toolbar view to self.
+- (void)addToolbarWithDelegate:(id<WebToolbarDelegate>)toolbarDelegate
+                       focuser:(id<OmniboxFocuser>)focuser
+                      tabModel:(TabModel*)tabModel
+              readingListModel:(ReadingListModel*)readingListModel;
+
+// Changes the frame of |searchField| based on its |initialFrame| and the scroll
+// view's y |offset|. Also adjust the alpha values for |_searchBoxBorder| and
+// |_shadow| and the constant values for the |constraints|.
+- (void)updateSearchField:(UIView*)searchField
+         withInitialFrame:(CGRect)initialFrame
+       subviewConstraints:(NSArray*)constraints
+                forOffset:(CGFloat)offset;
+
+// Initializes |_searchBoxBorder| and |_shadow| and adds them to |searchField|.
+- (void)addViewsToSearchField:(UIView*)searchField;
+
+// Animates |_shadow|'s alpha to 0.
+- (void)fadeOutShadow;
+
+// Hide toolbar subviews that should not be displayed on the new tab page.
+- (void)hideToolbarViewsForNewTabPage;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HEADER_VIEW_H_