Manually fetch favicons after hash changes.

Hash changes don't trigger |-didFinishNavigation|, so favicons
must be fetched manually.

BUG=531267

Review URL: https://codereview.chromium.org/1360543004

Cr-Commit-Position: refs/heads/master@{#372731}
(cherry picked from commit 61b25a2)

Review URL: https://codereview.chromium.org/1663463002 .

Cr-Commit-Position: refs/branch-heads/2623@{#242}
Cr-Branched-From: 92d7753-refs/heads/master@{#369907}

Author: Kurt Horimoto

ios/web/web_state/js/resources/core.js

@@ -434,6 +434,11 @@ goog.require('__crWeb.message');
     return anchor.href;
   };
 
+  __gCrWeb['sendFaviconsToHost'] = function() {
+    __gCrWeb.message.invokeOnHost({'command': 'document.favicons',
+                                   'favicons': __gCrWeb.common.getFavicons()});
+  }
+
   // Tracks whether user is in the middle of scrolling/dragging. If user is
   // scrolling, ignore window.scrollTo() until user stops scrolling.
   var webViewScrollViewIsDragging_ = false;

ios/web/web_state/js/resources/core_dynamic_ui.js

@@ -116,8 +116,7 @@ __gCrWeb.core_dynamic = {};
     var loaded_ = function() {
       invokeOnHost_({'command': 'document.loaded'});
       // Send the favicons to the browser.
-      invokeOnHost_({'command': 'document.favicons',
-                    'favicons': __gCrWeb.common.getFavicons()});
+      __gCrWeb.sendFaviconsToHost();
       // Add placeholders for plugin content.
       if (__gCrWeb.common.updatePluginPlaceholders())
         __gCrWeb.message.invokeOnHost({'command': 'addPluginPlaceholders'});

ios/web/web_state/js/resources/core_dynamic_wk.js

@@ -41,8 +41,7 @@ __gCrWeb.core_dynamic = {};
    */
   __gCrWeb.didFinishNavigation = function() {
     // Send the favicons to the browser.
-    __gCrWeb.message.invokeOnHost({'command': 'document.favicons',
-                                   'favicons': __gCrWeb.common.getFavicons()});
+    __gCrWeb.sendFaviconsToHost();
     // Add placeholders for plugin content.
     if (__gCrWeb.common.updatePluginPlaceholders())
       __gCrWeb.message.invokeOnHost({'command': 'addPluginPlaceholders'});

ios/web/web_state/ui/crw_web_controller.mm

@@ -2426,6 +2426,11 @@ - (BOOL)handleWindowHashChangeMessage:(base::DictionaryValue*)message
                               context:(NSDictionary*)context {
   [self checkForUnexpectedURLChange];
 
+  // Because hash changes don't trigger |-didFinishNavigation|, fetch favicons
+  // for the new page manually.
+  [self evaluateJavaScript:@"__gCrWeb.sendFaviconsToHost();"
+       stringResultHandler:nil];
+
   // Notify the observers.
   _webStateImpl->OnUrlHashChanged();
   return YES;