[Mac] The profile name field shouldn't be multi line because that's silly.

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

 // Copyright 2014 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 <Cocoa/Cocoa.h>
 
 #import "chrome/browser/ui/cocoa/profiles/profile_chooser_controller.h"
 
 #include "base/mac/bundle_locations.h"
 #include "base/prefs/pref_service.h"
@@ skipping 624 matching lines @@
           [[NSTextField alloc] initWithFrame:frameRect]);
       [profileNameTextField_ setStringValue:profileName];
       [profileNameTextField_ setFont:[NSFont labelFontOfSize:kTitleFontSize]];
       [profileNameTextField_ setEditable:YES];
       [profileNameTextField_ setDrawsBackground:YES];
       [profileNameTextField_ setBezeled:YES];
       [profileNameTextField_ setAlignment:NSCenterTextAlignment];
       [[profileNameTextField_ cell] setWraps:NO];
       [[profileNameTextField_ cell] setLineBreakMode:
           NSLineBreakByTruncatingTail];
+      [[profileNameTextField_ cell] setUsesSingleLineMode:YES];
       [self addSubview:profileNameTextField_];
       [profileNameTextField_ setTarget:self];
       [profileNameTextField_ setAction:@selector(saveProfileName:)];
 
       // Hide the textfield until the user clicks on the button.
       [profileNameTextField_ setHidden:YES];
 
       [[self cell] accessibilitySetOverrideValue:l10n_util::GetNSStringF(
           IDS_PROFILES_NEW_AVATAR_MENU_EDIT_NAME_ACCESSIBLE_NAME,
           base::SysNSStringToUTF16(profileName))
@@ skipping 1549 matching lines @@
 }
 
 - (bool)shouldShowGoIncognito {
   bool incognitoAvailable =
       IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
           IncognitoModePrefs::DISABLED;
   return incognitoAvailable && !browser_->profile()->IsGuestSession();
 }
 
 @end