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

ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_view_controller.mm

Index: ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_view_controller.mm
diff --git a/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_view_controller.mm b/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_view_controller.mm
new file mode 100644
index 0000000000000000000000000000000000000000..6cda5ab2022f65e730730d84e086564876cf3c1a
--- /dev/null
+++ b/ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_view_controller.mm
@@ -0,0 +1,139 @@
+// 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.
+
+#import "ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_view_controller.h"
+
+#import "base/mac/scoped_nsobject.h"
+#import "ios/chrome/browser/ui/ntp/recent_tabs/recent_tabs_panel_controller.h"
+#import "ios/chrome/browser/ui/ntp/recent_tabs/views/panel_bar_view.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+#include "ios/chrome/grit/ios_theme_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+#include "ui/base/resource/resource_bundle.h"
+
+// A UIViewController that forces the status bar to be visible.
+@interface RecentTabsWrapperViewController : UIViewController
+@end
+
+@implementation RecentTabsWrapperViewController
+
+- (BOOL)prefersStatusBarHidden {
+  return NO;
+}
+
+@end
+
+@implementation RecentTabsPanelViewController {
+  base::scoped_nsobject<RecentTabsPanelController> _recentTabsController;
+  base::scoped_nsobject<PanelBarView> _panelBarView;
+}
+
++ (UIViewController*)controllerToPresentForBrowserState:
+                         (ios::ChromeBrowserState*)browserState
+                                                 loader:(id<UrlLoader>)loader {
+  UIViewController* controller =
+      [[[RecentTabsWrapperViewController alloc] init] autorelease];
+  RecentTabsPanelViewController* rtpvc = [[[RecentTabsPanelViewController alloc]
+      initWithLoader:loader
+        browserState:browserState] autorelease];
+  [controller addChildViewController:rtpvc];
+
+  PanelBarView* panelBarView = [[[PanelBarView alloc] init] autorelease];
+  rtpvc->_panelBarView.reset([panelBarView retain]);
+  [panelBarView setCloseTarget:rtpvc action:@selector(didFinish)];
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  gfx::Image shadowImage = rb.GetNativeImageNamed(IDR_IOS_TOOLBAR_SHADOW);
+  base::scoped_nsobject<UIImageView> shadow(
+      [[UIImageView alloc] initWithImage:shadowImage.ToUIImage()]);
+
+  [panelBarView setTranslatesAutoresizingMaskIntoConstraints:NO];
+  [rtpvc.view setTranslatesAutoresizingMaskIntoConstraints:NO];
+  [shadow setTranslatesAutoresizingMaskIntoConstraints:NO];
+
+  [controller.view addSubview:panelBarView];
+  [controller.view addSubview:rtpvc.view];
+  [controller.view addSubview:shadow];
+
+  NSDictionary* viewsDictionary =
+      @{ @"bar" : panelBarView,
+         @"table" : rtpvc.view,
+         @"shadow" : shadow };
+  // clang-format off
+  NSArray* constraints = @[
+    @"V:|-0-[bar]-0-[table]-0-|",
+    @"V:[bar]-0-[shadow]",
+    @"H:|-0-[bar]-0-|",
+    @"H:|-0-[table]-0-|",
+    @"H:|-0-[shadow]-0-|"
+  ];
+  // clang-format on
+  ApplyVisualConstraints(constraints, viewsDictionary, controller.view);
+  return controller;
+}
+
+- (void)dealloc {
+  [_recentTabsController dismissKeyboard];
+  [_recentTabsController dismissModals];
+  [super dealloc];
+}
+
+- (instancetype)initWithLoader:(id<UrlLoader>)loader
+                  browserState:(ios::ChromeBrowserState*)browserState {
+  self = [super initWithNibName:nil bundle:nil];
+  if (self) {
+    _recentTabsController.reset([[RecentTabsPanelController alloc]
+        initWithLoader:loader
+          browserState:browserState]);
+    if ([self respondsToSelector:@selector(edgesForExtendedLayout)])
+      self.edgesForExtendedLayout = UIRectEdgeNone;
+  }
+  return self;
+}
+
+- (instancetype)initWithNibName:(NSString*)nibNameOrNil
+                         bundle:(NSBundle*)nibBundleOrNil {
+  NOTREACHED();
+  return nil;
+}
+
+- (instancetype)initWithCoder:(NSCoder*)aDecoder {
+  NOTREACHED();
+  return nil;
+}
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+  CGRect frame = self.view.bounds;
+  [_recentTabsController view].frame = frame;
+  [self.view addSubview:[_recentTabsController view]];
+}
+
+- (void)viewWillTransitionToSize:(CGSize)size
+       withTransitionCoordinator:
+           (id<UIViewControllerTransitionCoordinator>)coordinator {
+  [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
+  [_panelBarView setNeedsUpdateConstraints];
+}
+
+- (BOOL)prefersStatusBarHidden {
+  return NO;
+}
+
+#pragma mark Accessibility
+
+- (BOOL)accessibilityPerformEscape {
+  [self didFinish];
+  return YES;
+}
+
+#pragma mark Actions
+
+- (void)didFinish {
+  [self dismissViewControllerAnimated:YES
+                           completion:^{
+                           }];
+}
+
+@end