Fixes document type detection on iOS 9.

ios/web/web_state/ui/crw_web_controller+protected.h

 // 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.
 
 #ifndef IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_PROTECTED_H_
 #define IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_PROTECTED_H_
 
 #import "ios/web/web_state/ui/crw_web_controller.h"
 
 #include "base/mac/scoped_nsobject.h"
@@ skipping 103 matching lines @@
 // Returns YES if the current navigation item corresponds to a web page
 // loaded by a POST request.
 - (BOOL)isCurrentNavigationItemPOST;
 
 // Returns the type of document object loaded in the web view.
 - (web::WebViewDocumentType)webViewDocumentType;
 
 // Loads the given HTML in the web view.
 - (void)loadWebHTMLString:(NSString*)html forURL:(const GURL&)URL;
 
+// Converts MIME type string to WebViewDocumentType.
+- (web::WebViewDocumentType)documentTypeFromMIMEType:(NSString*)MIMEType;

[Eugene But (OOO till 7-30), 2015/11/19 16:29:01]

This interface is divided by section. And this very section is "Methods
implemented by subclasses". 

Please move this method lower to "Internal methods for use by subclasses"
section.

[stkhapugin, 2015/11/20 10:50:43]

Done.

+
 // These public methods should be implemented by subclasses.
 //- (void)evaluateJavaScript:(NSString*)script
 //       stringResultHandler:(web::JavaScriptCompletion)handler;
 //- (BOOL)scriptHasBeenInjectedForClass:(Class)jsInjectionManagerClass
 //                       presenceBeacon:(NSString*)beacon;
 //- (void)loadRequest:(NSMutableURLRequest*)request;
 // Subclasses must call super's implementation.
 //- (void)injectScript:(NSString*)script
 //            forClass:(Class)jsInjectionManagerClass;
 //- (web::WebViewType)webViewType;
@@ skipping 272 matching lines @@
 
 // Returns the current entry from the underlying session controller.
 - (CRWSessionEntry*)currentSessionEntry;
 
 // Resets pending external request information.
 - (void)resetExternalRequest;
 
 @end
 
 #endif  // IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_PROTECTED_H_