favor DCHECK_CURRENTLY_ON for better logs in chrome/browser/media_galleries , metrics and nacl_host

chrome/browser/nacl_host/nacl_browser_delegate_impl.cc

 // Copyright 2013 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/browser/nacl_host/nacl_browser_delegate_impl.h"
 
 #include <vector>
 
 #include "base/path_service.h"
 #include "base/strings/string_split.h"
@@ skipping 41 matching lines @@
 // associated extension process manager.
 //
 // There is a 1:many relationship for extension:nacl-embeds, but only a
 // 1:1 relationship for NaClProcessHost:PP_Instance. The content layer doesn't
 // rely on this knowledge because it routes messages for ppapi non-nacl
 // instances as well, though they won't have callbacks set. Here the 1:1
 // assumption is made and DCHECKed.
 void OnKeepaliveOnUIThread(
     const content::BrowserPpapiHost::OnKeepaliveInstanceData& instance_data,
     const base::FilePath& profile_data_directory) {
-  DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
+  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   // Only one instance will exist for NaCl embeds, even when more than one
   // embed of the same plugin exists on the same page.
   DCHECK_EQ(1U, instance_data.size());
   if (instance_data.size() < 1)
     return;
 
 #if defined(ENABLE_EXTENSIONS)
   extensions::ProcessManager::OnKeepaliveFromPlugin(
       instance_data[0].render_process_id,
@@ skipping 167 matching lines @@
     const base::FilePath& profile_directory) {
   // Get the profile associated with the renderer.
   Profile* profile = profile_manager_->GetProfileByPath(profile_directory);
   DCHECK(profile);
   scoped_refptr<extensions::InfoMap> extension_info_map =
       extensions::ExtensionSystem::Get(profile)->info_map();
   DCHECK(extension_info_map.get());
   return extension_info_map;
 }
 #endif