Move didCommitNavigation into CRWWKNavigationHandler.

This CL moves the WKNavigationDelegate method "didCommitNavigation" from
CRWWebController into CRWWKNavigationHandler.

Bug: 956511
Change-Id: I74e7ce823f65da2e61e5b79b49a4820ecba0f42c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1634860
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#665514}

ios/web/navigation/BUILD.gn

@@ -20,6 +20,7 @@ source_set("navigation") {
     "//ios/net",
     "//ios/web:core",
     "//ios/web/common",
+    "//ios/web/js_messaging",
     "//ios/web/navigation:wk_navigation_util",
     "//ios/web/public",
     "//ios/web/public/deprecated",

ios/web/navigation/crw_wk_navigation_handler.h

@@ -16,6 +16,7 @@
 @class CRWWKNavigationHandler;
 @class CRWPendingNavigationInfo;
 @class CRWWKNavigationStates;
+@class CRWJSInjector;
 class GURL;
 namespace base {
 class RepeatingTimer;
@@ -45,6 +46,10 @@ class WKBackForwardListItemHolder;
     certVerificationErrorsForNavigationHandler:
         (CRWWKNavigationHandler*)navigationHandler;
 
+// Returns the associated js injector.
+- (CRWJSInjector*)JSInjectorForNavigationHandler:
+    (CRWWKNavigationHandler*)navigationHandler;
+
 // Returns YES if WKWebView is halted.
 - (BOOL)navigationHandlerWebViewIsHalted:
     (CRWWKNavigationHandler*)navigationHandler;
@@ -117,6 +122,33 @@ class WKBackForwardListItemHolder;
 - (void)navigationHandlerRemoveAllWebFrames:
     (CRWWKNavigationHandler*)navigationHandler;
 
+// Instructs the delegate to display the webView.
+- (void)navigationHandlerDisplayWebView:
+    (CRWWKNavigationHandler*)navigationHandler;
+
+// Resets any state that is associated with a specific document object (e.g.,
+// page interaction tracking).
+- (void)navigationHandlerResetDocumentSpecificState:
+    (CRWWKNavigationHandler*)navigationHandler;
+
+// Notifies the delegate that the page has actually started loading.
+- (void)navigationHandlerDidStartLoading:
+    (CRWWKNavigationHandler*)navigationHandler;
+
+// Notifies the delegate that the web page has changed document and/or URL.
+- (void)navigationHandler:(CRWWKNavigationHandler*)navigationHandler
+    didChangePageWithContext:(web::NavigationContextImpl*)context;
+
+// Instructs the delegate to update the SSL status for the current navigation
+// item.
+- (void)navigationHandlerUpdateSSLStatusForCurrentNavigationItem:
+    (CRWWKNavigationHandler*)navigationHandler;
+
+// Instructs the delegate to update the HTML5 history state of the page using
+// the current NavigationItem.
+- (void)navigationHandlerUpdateHTML5HistoryState:
+    (CRWWKNavigationHandler*)navigationHandler;
+
 @end
 
 // Handler class for WKNavigationDelegate, deals with navigation callbacks from
@@ -199,6 +231,10 @@ class WKBackForwardListItemHolder;
 // TODO(crbug.com/956511): Make this private once refactor is done.
 - (void)forgetNullWKNavigation:(WKNavigation*)navigation;
 
+// Sets last committed NavigationItem's title to the given |title|, which can
+// not be nil.
+- (void)setLastCommittedNavigationItemTitle:(NSString*)title;
+
 @end
 
 #endif  // IOS_WEB_NAVIGATION_CRW_WK_NAVIGATION_HANDLER_H_