[Mac, Win] Don't allow blank spaces in profile names in the new avatar bubble.

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 601 matching lines @@
     [self setBordered:NO];
     [self setFont:[NSFont labelFontOfSize:kTitleFontSize]];
     [self setAlignment:NSCenterTextAlignment];
     [[self cell] setLineBreakMode:NSLineBreakByTruncatingTail];
     [self setTitle:profileName];
   }
   return self;
 }
 
 - (void)saveProfileName:(id)sender {
-  NSString* text = [profileNameTextField_ stringValue];
+  base::string16 newProfileName =
+      base::SysNSStringToUTF16([profileNameTextField_ stringValue]);
+
   // Empty profile names are not allowed, and are treated as a cancel.
-  if ([text length] > 0) {
-    profiles::UpdateProfileName(profile_, base::SysNSStringToUTF16(text));
+  base::TrimWhitespace(newProfileName, base::TRIM_ALL, &newProfileName);
+  if (!newProfileName.empty()) {
+    profiles::UpdateProfileName(profile_, newProfileName);
     [controller_
         postActionPerformed:ProfileMetrics::PROFILE_DESKTOP_MENU_EDIT_NAME];
-    [self setTitle:text];
+    [self setTitle:base::SysUTF16ToNSString(newProfileName)];
+  } else {
+    // Since the text is empty and not allowed, revert it from the textbox.
+    [profileNameTextField_ setStringValue:[self title]];
   }
   [profileNameTextField_ setHidden:YES];
 }
 
 - (void)showEditableView:(id)sender {
   [profileNameTextField_ setHidden:NO];
   [[self window] makeFirstResponder:profileNameTextField_];
 }
 
 @end
@@ skipping 1311 matching lines @@
 }
 
 - (bool)shouldShowGoIncognito {
   bool incognitoAvailable =
       IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
           IncognitoModePrefs::DISABLED;
   return incognitoAvailable && !browser_->profile()->IsGuestSession();
 }
 
 @end