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

ios/chrome/browser/ui/popup_menu/popup_menu_view.mm

+// 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.
+
+#import "ios/chrome/browser/ui/popup_menu/popup_menu_view.h"
+
+#import <QuartzCore/QuartzCore.h>
+
+#include "base/mac/scoped_nsobject.h"
+
+namespace {
+// The image edge insets for popup_background.png.
+NS_INLINE UIEdgeInsets PopupBackgroundInsets() {
+  return UIEdgeInsetsMake(28, 28, 28, 28);
+}
+};
+
+@implementation PopupMenuView {
+  base::scoped_nsobject<UIImageView> imageView_;
+}
+
+@synthesize delegate = delegate_;
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  self = [super initWithFrame:frame];
+  if (self)
+    [self commonInitialization];
+
+  return self;
+}
+
+- (instancetype)initWithCoder:(NSCoder*)aDecoder {
+  self = [super initWithCoder:aDecoder];
+  if (self)
+    [self commonInitialization];
+
+  return self;
+}
+
+- (void)commonInitialization {
+  UIImage* image = [UIImage imageNamed:@"popup_background"];
+  image = [image resizableImageWithCapInsets:PopupBackgroundInsets()];
+
+  imageView_.reset([[UIImageView alloc] initWithImage:image]);
+  [self addSubview:imageView_];
+}
+
+- (void)layoutSubviews {
+  [super layoutSubviews];
+  [imageView_ setFrame:[self bounds]];
+}
+
+- (BOOL)accessibilityPerformEscape {
+  if (delegate_) {
+    [delegate_ dismissPopupMenu];
+    UIAccessibilityPostNotification(UIAccessibilityScreenChangedNotification,
+                                    nil);
+    return YES;
+  }
+  return NO;
+}
+
+@end