Change the maximum account chooser height to 3.5 rows on Mac.

chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.mm

Index: chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.mm
diff --git a/chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.mm b/chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.mm
index 9a15399faf0a709e9bd1ae7ec11932c197248715..949b5139ccaa955bc8df680172f8cfb6f27a3cf8 100644
--- a/chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.mm
+++ b/chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.mm
@@ -31,8 +31,8 @@ namespace {
 constexpr CGFloat kCredentialHeight =
     kAvatarImageSize + 2 * kVerticalAvatarMargin;
 
-// Maximum number of accounts displayed before vertical scrolling appears.
-constexpr size_t kMaxAccounts = 3;
+// Maximum height of the credential list. The unit is one row height.
+constexpr CGFloat kMaxHeightAccounts = 3.5;
 
 }  // namespace
 
@@ -104,12 +104,14 @@ constexpr size_t kMaxAccounts = 3;
 
   NSSize buttonsSize = NSMakeSize(
       kDesiredBubbleWidth,
-      std::min([credentialButtons_ count], kMaxAccounts) * kCredentialHeight);
+      std::min<CGFloat>([credentialButtons_ count], kMaxHeightAccounts) *
+          kCredentialHeight);
   base::scoped_nsobject<NSScrollView> scrollView = [[NSScrollView alloc]
       initWithFrame:NSMakeRect(0, 0, buttonsSize.width, buttonsSize.height)];
-  [scrollView setHasVerticalScroller:[credentialButtons_ count] > kMaxAccounts
-                                         ? YES
-                                         : NO];
+  [scrollView
+      setHasVerticalScroller:[credentialButtons_ count] > kMaxHeightAccounts
+                                 ? YES
+                                 : NO];
   [scrollView setBorderType:NSNoBorder];
   CGFloat buttonWidth = [scrollView contentSize].width;
   CGFloat curY = 0;