Tweak PathProviderPosix's FILE_EXE and FILE_MODULE handling on FreeBSD.

chrome/default_plugin/plugin_impl_mac.mm

 // 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/default_plugin/plugin_impl_mac.h"
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 24 matching lines @@
 PluginInstallerImpl::~PluginInstallerImpl() {
   [command_ release];
 }
 
 bool PluginInstallerImpl::Initialize(void* module_handle, NPP instance,
                                      NPMIMEType mime_type, int16 argc,
                                      char* argn[], char* argv[]) {
   DVLOG(1) << __FUNCTION__ << " MIME Type : " << mime_type;
   DCHECK(instance != NULL);
 
-  if (mime_type == NULL || strlen(mime_type) == 0) {
+  if (mime_type == NULL || *mime_type == '\0') {
     DLOG(WARNING) << __FUNCTION__ << " Invalid parameters passed in";
     NOTREACHED();
     return false;
   }
 
   instance_ = instance;
   mime_type_ = mime_type;
 
   command_ = [l10n_util::FixUpWindowsStyleLabel(l10n_util::GetStringUTF16(
       IDS_DEFAULT_PLUGIN_NO_PLUGIN_AVAILABLE_MSG)) retain];
@@ skipping 139 matching lines @@
 }
 
 void PluginInstallerImpl::NotifyPluginStatus(int status) {
   ChildThread::current()->Send(
       new ChromePluginProcessHostMsg_MissingPluginStatus(
           status,
           renderer_process_id(),
           render_view_id(),
           0));
 }