[ios clean] ToolsMenu Mediator observes Webstate.

ios/clean/chrome/browser/ui/tools/menu_view_controller.mm

Index: ios/clean/chrome/browser/ui/tools/menu_view_controller.mm
diff --git a/ios/clean/chrome/browser/ui/tools/menu_view_controller.mm b/ios/clean/chrome/browser/ui/tools/menu_view_controller.mm
index ef10a233fdb75b5076690e7184afbe557e3e4440..81e8c12339c5a4a35ba6e144275594fe36cfad10 100644
--- a/ios/clean/chrome/browser/ui/tools/menu_view_controller.mm
+++ b/ios/clean/chrome/browser/ui/tools/menu_view_controller.mm
@@ -83,9 +83,6 @@ const CGFloat kCloseButtonHeight = 44.0;
   self.menuScrollView.translatesAutoresizingMaskIntoConstraints = NO;
   [self.view addSubview:self.menuScrollView];
 
-  // PLACEHOLDER: Hardcoded value until the mediator observes the Webstate.
-  self.currentPageLoading = NO;
-
   [self setupCloseMenuButton];
   [self setupMenuStackView];
   [self setupConstraints];
@@ -253,4 +250,17 @@ const CGFloat kCloseButtonHeight = 44.0;
   self.displayOverflowControls = displayOverflowControls;
 }
 
+- (void)setIsLoading:(BOOL)isLoading {
+  self.currentPageLoading = isLoading;
+}
+
+- (void)setCurrentPageLoading:(BOOL)currentPageLoading {
+  _currentPageLoading = currentPageLoading;
+  // If the OverflowButtons have been initialized update their visibility.
+  if (self.toolbarOverflowStackView) {
+    self.toolbarOverflowStackView.reloadButton.hidden = currentPageLoading;
+    self.toolbarOverflowStackView.stopButton.hidden = !currentPageLoading;
+  }
+}
+
 @end