Fixes document type detection on iOS 9.

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

Index: ios/web/web_state/ui/crw_web_controller+protected.h
diff --git a/ios/web/web_state/ui/crw_web_controller+protected.h b/ios/web/web_state/ui/crw_web_controller+protected.h
index 187d12fd2946622ae3e3df628d90a9897a8d76ac..a6bc4dad8f76ea7e4f1312bbd06b9b4fbcd2f890 100644
--- a/ios/web/web_state/ui/crw_web_controller+protected.h
+++ b/ios/web/web_state/ui/crw_web_controller+protected.h
@@ -121,6 +121,9 @@ struct NewWindowInfo {
 // 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;