Change the login name auto completion logic to case sensitive....

chrome/renderer/password_autocomplete_manager.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/renderer/password_autocomplete_manager.h"
 
 #include "app/keyboard_codes.h"
 #include "base/message_loop.h"
 #include "base/scoped_ptr.h"
 #include "chrome/common/render_messages.h"
@@ skipping 143 matching lines @@
   element->setAutofilled(autofilled);
   // Notify any changeEvent listeners.
   element->dispatchFormControlChangeEvent();
 }
 
 bool DoUsernamesMatch(const string16& username1,
                       const string16& username2,
                       bool exact_match) {
   if (exact_match)
     return username1 == username2;
-  return StartsWith(username1, username2, false);
+  return StartsWith(username1, username2, true);
 }
 
 }  // namespace
 
 ////////////////////////////////////////////////////////////////////////////////
 // PasswordAutocompleteManager, public:
 
 PasswordAutocompleteManager::PasswordAutocompleteManager(
     RenderView* render_view)
     : render_view_(render_view),
@@ skipping 289 matching lines @@
   SetElementAutofilled(username_element, true);
   if (IsElementEditable(*password_element))
     password_element->setValue(password);
   SetElementAutofilled(password_element, true);
   return true;
 }
 
 int PasswordAutocompleteManager::GetRoutingID() const {
   return render_view_->routing_id();
 }