Removed error log message on empty string.

ceee/ie/plugin/bho/browser_helper_object.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.
 //
 // IE browser helper object implementation.
 #include "ceee/ie/plugin/bho/browser_helper_object.h"
 
 #include <atlsafe.h>
 #include <shlguid.h>
 
@@ skipping 109 matching lines @@
     LOG(INFO) <<
         "Refused to instantiate the BHO when the visual component is hidden.";
     return E_FAIL;
   }
 
   const wchar_t* bho_list = NULL;
   ::LoadString(_pModule->m_hInstResource, IDS_CEEE_NESTED_BHO_LIST,
                reinterpret_cast<wchar_t*>(&bho_list), 0);
   if (bho_list == NULL) {
     LOG(ERROR) << "Failed to load string: " << GetLastError();
-  } else {
+  } else if (wcslen(bho_list) > 0) {
     std::vector<std::wstring> guids;
     base::SplitString(bho_list, ',', &guids);
     for (size_t i = 0; i < guids.size(); ++i) {
       CLSID clsid;
       base::win::ScopedComPtr<IObjectWithSite> factory;
       HRESULT hr = ::CLSIDFromString(guids[i].c_str(), &clsid);
       if (SUCCEEDED(hr)) {
         hr = factory.CreateInstance(clsid);
         if (SUCCEEDED(hr)) {
           nested_bho_.push_back(factory);
@@ skipping 1526 matching lines @@
     return S_FALSE;
   } else {
     return SendEventToBrokerImpl(event_name, event_args);
   }
 }
 
 HRESULT BrowserHelperObject::SendEventToBrokerImpl(
     const std::string& event_name, const std::string& event_args) {
   return broker_rpc().FireEvent(event_name.c_str(), event_args.c_str());
 }