favor DCHECK_CURRENTLY_ON for better logs in content/browser/[f-p]*

content/browser/plugin_process_host_mac.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 <Carbon/Carbon.h>
 
 #include "build/build_config.h"
 
 #include <vector>
 
@@ skipping 65 matching lines @@
   }
 
   if (browser_needs_activation) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(base::mac::ActivateProcess, base::GetCurrentProcId()));
   }
 }
 
 void PluginProcessHost::OnAppActivation() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   // If our plugin process has any modal windows up, we need to bring it forward
   // so that they act more like an in-process modal window would.
   if (!plugin_modal_windows_set_.empty()) {
     BrowserThread::PostTask(
         BrowserThread::UI, FROM_HERE,
         base::Bind(base::mac::ActivateProcess, process_->GetData().handle));
   }
 }
 
 void PluginProcessHost::OnPluginSetCursorVisibility(bool visible) {
   if (plugin_cursor_visible_ != visible) {
     plugin_cursor_visible_ = visible;
     BrowserThread::PostTask(BrowserThread::UI, FROM_HERE,
                             base::Bind(base::mac::SetCursorVisibility,
                                        visible));
   }
 }
 
 }  // namespace content