Move _changingHistoryState to superclass.

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"
 
 #import <WebKit/WebKit.h>
@@ skipping 72 matching lines @@
 
 // Loads request for the URL of the current navigation item. Subclasses may
 // choose to build a new NSURLRequest and call |loadRequest| on the underlying
 // web view, or use native web view navigation where possible (for example,
 // going back and forward through the history stack).
 - (void)loadRequestForCurrentNavigationItem;
 
 // Cancels any load in progress in the web view.
 - (void)abortWebLoad;
 
-// Returns selector to handle JavaScript message with command property
-// |command|. Subclasses may override to handle class-specific messages.
-- (SEL)selectorToHandleJavaScriptCommand:(const std::string&)command;
-
 // Sets zoom scale value for webview scroll view from |zoomState|.
 - (void)applyWebViewScrollZoomScaleFromZoomState:
     (const web::PageZoomState&)zoomState;
 
 // Handles cancelled load in WKWebView (error with NSURLErrorCancelled code).
 - (void)handleCancelledError:(NSError*)error;
 
 // Creates a web view with given |config|. No-op if web view is already created.
 - (void)ensureWebViewCreatedWithConfiguration:(WKWebViewConfiguration*)config;
 
@@ skipping 70 matching lines @@
 // destruction.
 @property(nonatomic, readonly) BOOL isHalted;
 
 // Returns whether the user is interacting with the page.
 @property(nonatomic, readonly) BOOL userIsInteracting;
 
 // YES if a user interaction has been registered at any time since the page has
 // loaded.
 @property(nonatomic, readwrite) BOOL userInteractionRegistered;
 
+// Whether the web page is currently performing window.history.pushState or
+// window.history.replaceState
+@property(nonatomic, readonly) BOOL changingHistoryState;
+
 // Returns the current window id.
 @property(nonatomic, readonly) NSString* windowId;
 
 // Returns windowID that is saved when a page changes. Used to detect refreshes.
 @property(nonatomic, readonly) NSString* lastSeenWindowID;
 
 // Returns NavigationManager's session controller.
 @property(nonatomic, readonly) CRWSessionController* sessionController;
 
 // Returns a new script which wraps |script| with windowID check so |script| is
@@ skipping 138 matching lines @@
 
 // Resets pending external request information.
 - (void)resetExternalRequest;
 
 // Converts MIME type string to WebViewDocumentType.
 - (web::WebViewDocumentType)documentTypeFromMIMEType:(NSString*)MIMEType;
 
 @end
 
 #endif  // IOS_WEB_WEB_STATE_UI_CRW_WEB_CONTROLLER_PROTECTED_H_