Add InfoBarPickerController for displaying a picker view from an infobar

ios/chrome/browser/infobars/infobar_picker_view.mm

+// Copyright 2016 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/infobars/infobar_picker_view.h"
+
+#import "base/mac/objc_property_releaser.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+
+@interface InfoBarPickerView () {
+  id<InfoBarPickerViewDelegate> _delegate;  // weak
+  base::mac::ObjCPropertyReleaser _propertyReleaser_InfoBarPickerView;
+}
+
+@end
+
+@implementation InfoBarPickerView
+
+@synthesize navigationBar = _navigationBar;
+@synthesize pickerView = _pickerView;
+
+- (instancetype)initWithFrame:(CGRect)frame {
+  if (self = [super initWithFrame:frame]) {
+    _propertyReleaser_InfoBarPickerView.Init(self, [InfoBarPickerView class]);
+    self.backgroundColor = [UIColor whiteColor];
+
+    _pickerView = [[UIPickerView alloc] initWithFrame:CGRectZero];
+    [_pickerView setShowsSelectionIndicator:YES];
+
+    _navigationBar = [[UINavigationBar alloc] initWithFrame:CGRectZero];
+    UIBarButtonItem* doneButton = [[[UIBarButtonItem alloc]
+        initWithBarButtonSystemItem:UIBarButtonSystemItemDone
+                             target:self

[marq (ping after 24h), 2016/06/28 13:43:18]

Better to set a target of nil, so the action will bubble up the responder chain.

+                             action:@selector(doneButtonPressed)] autorelease];
+    UIBarButtonItem* cancelButton = [[[UIBarButtonItem alloc]
+        initWithBarButtonSystemItem:UIBarButtonSystemItemCancel
+                             target:self
+                             action:@selector(cancelButtonPressed)]
+        autorelease];
+    UINavigationItem* navigationItem =
+        [[UINavigationItem alloc] initWithTitle:@""];
+    [navigationItem setRightBarButtonItem:doneButton];
+    [navigationItem setLeftBarButtonItem:cancelButton];
+    [navigationItem setHidesBackButton:YES];
+    [_navigationBar pushNavigationItem:navigationItem animated:NO];
+
+    _pickerView.translatesAutoresizingMaskIntoConstraints = NO;
+    _navigationBar.translatesAutoresizingMaskIntoConstraints = NO;
+    UIStackView* stackView = [[[UIStackView alloc]
+        initWithArrangedSubviews:@[ _navigationBar, _pickerView ]] autorelease];
+    stackView.axis = UILayoutConstraintAxisVertical;
+    stackView.translatesAutoresizingMaskIntoConstraints = NO;
+
+    [self addSubview:stackView];
+    AddSameSizeConstraint(stackView, self);
+    AddSameCenterConstraints(stackView, self);
+  }
+  return self;
+}
+
+- (void)setDelegate:(id<InfoBarPickerViewDelegate>)delegate {
+  _delegate = delegate;
+}
+
+- (id<InfoBarPickerViewDelegate>)delegate {
+  return _delegate;
+}
+
+- (void)setPickerDelegate:(id<UIPickerViewDelegate>)pickerDelegate {
+  _pickerView.delegate = pickerDelegate;
+}
+
+- (id<UIPickerViewDelegate>)pickerDelegate {
+  return _pickerView.delegate;
+}
+
+- (void)setPickerDataSource:(id<UIPickerViewDataSource>)pickerDataSource {
+  _pickerView.dataSource = pickerDataSource;
+}
+
+- (id<UIPickerViewDataSource>)pickerDataSource {
+  return _pickerView.dataSource;
+}
+
+- (void)doneButtonPressed {
+  [_delegate infoBarPickerViewPressedDone:self];
+}
+
+- (void)cancelButtonPressed {
+  [_delegate infoBarPickerViewPressedCancel:self];
+}
+
+@end