[ios clean] Dismisses ToolsMenu on Layout changes.

ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm

Index: ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm
diff --git a/ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm b/ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm
index bdfcad661eced3e263d3fcc6dd2f08f31d3be217..bd7c3e1e60dfbd2794e3d41f060c18fe5e8335e9 100644
--- a/ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm
+++ b/ios/clean/chrome/browser/ui/tab_grid/tab_grid_view_controller.mm
@@ -85,6 +85,14 @@
       UIEdgeInsetsMake(CGRectGetMaxY(self.toolbar.frame), 0, 0, 0);
 }
 
+- (void)viewWillTransitionToSize:(CGSize)size
+       withTransitionCoordinator:
+           (id<UIViewControllerTransitionCoordinator>)coordinator {
+  // We need to dismiss the ToolsMenu everytime the Toolbar frame changes
+  // (e.g. Size changes, rotation changes, etc.)
+  [self.dispatcher closeToolsMenu];
+}
+
 #pragma mark - SettingsActions
 
 - (void)showSettings:(id)sender {