Convert ios_web_view_shell to pure Objective-C.

ios/web_view/shell/shell_view_controller.m

 // 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/web_view/shell/shell_view_controller.h"
 
 #import "ios/web_view/public/criwv.h"
 #import "ios/web_view/public/criwv_web_view.h"
 #import "ios/web_view/shell/translate_controller.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
-namespace {
-const CGFloat kButtonSize = 44;
-}
-
 @interface ShellViewController ()
 // Container for |webView|.
-@property (nonatomic, strong) UIView* containerView;
+@property(nonatomic, strong) UIView* containerView;
 // Text field used for navigating to URLs.
-@property (nonatomic, strong) UITextField* field;
+@property(nonatomic, strong) UITextField* field;
 // Toolbar containing navigation buttons and |field|.
-@property (nonatomic, strong) UIToolbar* toolbar;
+@property(nonatomic, strong) UIToolbar* toolbar;
 // CRIWV view which renders the web page.
-@property (nonatomic, strong) id<CRIWVWebView> webView;
+@property(nonatomic, strong) id<CRIWVWebView> webView;
 // Handles the translation of the content displayed in |webView|.
-@property (nonatomic, strong) TranslateController* translateController;
+@property(nonatomic, strong) TranslateController* translateController;
 
 - (void)back;
 - (void)forward;
 - (void)stopLoading;
 @end
 
 @implementation ShellViewController
 
 @synthesize containerView = _containerView;
 @synthesize field = _field;
@@ skipping 19 matching lines @@
 
   // Set up the container view.
   self.containerView = [[UIView alloc] init];
   [_containerView setFrame:CGRectMake(0, 64, CGRectGetWidth(bounds),
                                       CGRectGetHeight(bounds) - 64)];
   [_containerView setBackgroundColor:[UIColor lightGrayColor]];
   [_containerView setAutoresizingMask:UIViewAutoresizingFlexibleWidth |
                                       UIViewAutoresizingFlexibleHeight];
   [self.view addSubview:_containerView];
 
+  const int kButtonCount = 3;
+  const CGFloat kButtonSize = 44;
+
   // Text field.
-  const int kButtonCount = 3;
   self.field = [[UITextField alloc]
       initWithFrame:CGRectMake(kButtonCount * kButtonSize, 6,
                                CGRectGetWidth([_toolbar frame]) -
                                    kButtonCount * kButtonSize - 10,
                                31)];
   [_field setDelegate:self];
   [_field setBackground:[[UIImage imageNamed:@"textfield_background"]
                             resizableImageWithCapInsets:UIEdgeInsetsMake(
                                                             12, 12, 12, 12)]];
   [_field setAutoresizingMask:UIViewAutoresizingFlexibleWidth];
@@ skipping 116 matching lines @@
   }
 }
 
 - (id<CRIWVTranslateDelegate>)translateDelegate {
   if (!_translateController)
     self.translateController = [[TranslateController alloc] init];
   return _translateController;
 }
 
 @end