[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..b097d52082ad3e483ce4f5ae25681867cb4bf0a5 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
@@ -25,6 +25,7 @@
 @property(nonatomic, weak) UIView* noTabsOverlay;
 @property(nonatomic, weak) TabGridToolbar* toolbar;
 @property(nonatomic, weak) MDCFloatingButton* floatingNewTabButton;
+@property(nonatomic, assign) CGRect currentFrame;
 @end
 
 @implementation TabGridViewController
@@ -32,6 +33,7 @@
 @synthesize noTabsOverlay = _noTabsOverlay;
 @synthesize toolbar = _toolbar;
 @synthesize floatingNewTabButton = _floatingNewTabButton;
+@synthesize currentFrame = _currentFrame;
 
 #pragma mark - Required subclass override
 
@@ -66,6 +68,8 @@
     [self.toolbar.trailingAnchor
         constraintEqualToAnchor:self.view.trailingAnchor]
   ]];
+
+  self.currentFrame = self.view.frame;
 }
 
 - (void)viewWillAppear:(BOOL)animated {
@@ -85,6 +89,15 @@
       UIEdgeInsetsMake(CGRectGetMaxY(self.toolbar.frame), 0, 0, 0);
 }
 
+- (void)viewWillLayoutSubviews {
+  // We need to dismiss the ToolsMenu everytime the Toolbar frame changes
+  // (e.g. Size changes, rotation changes, etc.)
+  if (!CGRectEqualToRect(self.currentFrame, self.view.frame)) {
+    [self.dispatcher closeToolsMenu];
+  }
+  self.currentFrame = self.view.frame;
+}
+
 #pragma mark - SettingsActions
 
 - (void)showSettings:(id)sender {