Chrome Frame: Fix bogus null check found by PVS Studio.

chrome_frame/chrome_frame_npapi.cc

 // Copyright (c) 2011 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_frame/chrome_frame_npapi.h"
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/string_split.h"
@@ skipping 381 matching lines @@
 
   DLOG(INFO) << "Do not have method: " << npapi::StringFromIdentifier(name);
 
   return false;
 }
 
 bool ChromeFrameNPAPI::Invoke(NPObject* header, NPIdentifier name,
                               const NPVariant* args, uint32_t arg_count,
                               NPVariant* result) {
   ChromeFrameNPAPI* plugin_instance = ChromeFrameInstanceFromNPObject(header);
-  if (!plugin_instance && (plugin_instance->automation_client_.get()))
+  if (!plugin_instance || !plugin_instance->automation_client_.get())
     return false;
 
   bool success = false;
   for (int i = 0; i < arraysize(plugin_methods_); ++i) {
     if (name == plugin_method_identifiers_[i]) {
       PluginMethod method = plugin_methods_[i];
       success = (plugin_instance->*method)(header, args, arg_count, result);
       break;
     }
   }
@@ skipping 717 matching lines @@
 void ChromeFrameNPAPI::URLRedirectNotify(const char* url, int status,
                                          void* notify_data) {
   DVLOG(1) << __FUNCTION__
            << "Received redirect notification for url:"
            << url;
   // Inform chrome about the redirect and disallow the current redirect
   // attempt.
   url_fetcher_.UrlRedirectNotify(url, status, notify_data);
   npapi::URLRedirectResponse(instance_, notify_data, false);
 }