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

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

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/passwords/account_chooser_view_controller.h"
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 13 matching lines @@
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/strings/grit/ui_strings.h"
 
 namespace {
 
 // Returns height of one credential item.
 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
 
 @interface AccountChooserViewController () {
   NSButton* cancelButton_;  // Weak.
   NSTextView* titleView_;   //  Weak.
   base::scoped_nsobject<NSArray> credentialButtons_;
   base::scoped_nsobject<AccountAvatarFetcherManager> avatarManager_;
 }
 - (void)onCancelClicked:(id)sender;
@@ skipping 51 matching lines @@
   [cancelButton_ setKeyEquivalent:kKeyEquivalentEscape];
   [view addSubview:cancelButton_];
 
   // Lay out the views.
   [cancelButton_ setFrameOrigin:NSMakePoint(
       kFramePadding + width - NSWidth([cancelButton_ frame]),
       kFramePadding)];
 
   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;
   base::scoped_nsobject<NSView> documentView([[NSView alloc]
       initWithFrame:NSMakeRect(0, 0, buttonWidth, [credentialButtons_ count] *
                                                       kCredentialHeight)]);
   for (CredentialItemButton* button in credentialButtons_.get()) {
     [documentView addSubview:button];
     [button setFrame:NSMakeRect(0, curY, buttonWidth, kCredentialHeight)];
     curY = NSMaxY([button frame]);
@@ skipping 102 matching lines @@
 
 - (NSArray*)credentialButtons {
   return credentialButtons_;
 }
 
 - (NSTextView*)titleView {
   return titleView_;
 }
 
 @end