[ios clean] Adds ToolsMenu to TabGrid

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

Index: ios/clean/chrome/browser/ui/tab_grid/tab_grid_toolbar.mm
diff --git a/ios/clean/chrome/browser/ui/tab_grid/tab_grid_toolbar.mm b/ios/clean/chrome/browser/ui/tab_grid/tab_grid_toolbar.mm
index 8f583b4a2250204f12ba610555a88961efd7487a..db1a3cdbbfccd42ef256096488cc6390918c86be 100644
--- a/ios/clean/chrome/browser/ui/tab_grid/tab_grid_toolbar.mm
+++ b/ios/clean/chrome/browser/ui/tab_grid/tab_grid_toolbar.mm
@@ -4,6 +4,7 @@
 
 #import "ios/clean/chrome/browser/ui/tab_grid/tab_grid_toolbar.h"
 
+#import "base/mac/foundation_util.h"
 #import "ios/clean/chrome/browser/ui/tab_grid/ui_stack_view+cr_tab_grid.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ -14,8 +15,14 @@ namespace {
 const CGFloat kToolbarHeight = 44.0f;
 }
 
+@interface TabGridToolbar ()
+@property(nonatomic, weak) UIStackView* toolbarContent;
+@end
+
 @implementation TabGridToolbar
 
+@synthesize toolbarContent = _toolbarContent;
+
 - (instancetype)init {
   if (self = [super init]) {
     UIVisualEffect* blurEffect =
@@ -28,23 +35,32 @@ const CGFloat kToolbarHeight = 44.0f;
 
     UIStackView* toolbarContent = [UIStackView cr_tabGridToolbarStackView];
     [toolbarView.contentView addSubview:toolbarContent];
-
+    _toolbarContent = toolbarContent;
     // Sets the stackview to a fixed height, anchored to the bottom of the
     // blur view.
-    toolbarContent.translatesAutoresizingMaskIntoConstraints = NO;
+    _toolbarContent.translatesAutoresizingMaskIntoConstraints = NO;
     [NSLayoutConstraint activateConstraints:@[
-      [toolbarContent.heightAnchor constraintEqualToConstant:kToolbarHeight],
-      [toolbarContent.leadingAnchor
+      [_toolbarContent.heightAnchor constraintEqualToConstant:kToolbarHeight],
+      [_toolbarContent.leadingAnchor
           constraintEqualToAnchor:toolbarView.contentView.leadingAnchor],
-      [toolbarContent.trailingAnchor
+      [_toolbarContent.trailingAnchor
           constraintEqualToAnchor:toolbarView.contentView.trailingAnchor],
-      [toolbarContent.bottomAnchor
+      [_toolbarContent.bottomAnchor
           constraintEqualToAnchor:toolbarView.contentView.bottomAnchor]
     ]];
   }
   return self;
 }
 
+#pragma mark - ZoomTransitionDelegate
+
+- (CGRect)rectForZoomWithKey:(NSObject*)key inView:(UIView*)view {
+  UIView* toolsMenuButtonView =
+      [self.toolbarContent.arrangedSubviews lastObject];
+  return [view convertRect:toolsMenuButtonView.bounds
+                  fromView:toolsMenuButtonView];
+}
+
 #pragma mark - UIView
 
 // Returns an intrinsic height so that explicit height constraints are