Implemented new Translate API for purely Objective-C clients.

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 <ChromeWebView/ChromeWebView.h>
 #import <MobileCoreServices/MobileCoreServices.h>
 
 #import "ios/web_view/shell/translate_controller.h"
@@ skipping 137 matching lines @@
   [CWVWebView setUserAgentProduct:@"Dummy/1.0"];
 
   CWVWebViewConfiguration* configuration =
       [CWVWebViewConfiguration defaultConfiguration];
   self.webView = [[CWVWebView alloc] initWithFrame:[_containerView bounds]
                                      configuration:configuration];
   // Gives a restoration identifier so that state restoration works.
   _webView.restorationIdentifier = @"webView";
   _webView.navigationDelegate = self;
   _webView.UIDelegate = self;
   _translateController = [[TranslateController alloc] init];

[Hiroshi Ichikawa, 2017/04/26 08:40:57]

Can you maybe rename this class and the variable name to _translateDelegate or
something? It's confusing with _webView.translationController now.

[jzw1, 2017/04/27 04:54:02]

Done.

-  _webView.translationDelegate = _translateController;
+  _webView.translationController.delegate = _translateController;
 
   [_webView setAutoresizingMask:UIViewAutoresizingFlexibleWidth |
                                 UIViewAutoresizingFlexibleHeight];
   [_containerView addSubview:_webView];
 
   NSURLRequest* request = [NSURLRequest
       requestWithURL:[NSURL URLWithString:@"https://www.google.com/"]];
   [_webView loadRequest:request];
 }
 
@@ skipping 208 matching lines @@
   // TODO(crbug.com/679895): Add some visual indication that the page load has
   // finished.
   [self updateToolbar];
 }
 
 - (void)webViewWebContentProcessDidTerminate:(CWVWebView*)webView {
   NSLog(@"webViewWebContentProcessDidTerminate");
 }
 
 @end