Add debuggin CHECK to help track down ExtensionHost crasher

chrome/browser/extensions/extensions_service.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.
 
 #include "chrome/browser/extensions/extensions_service.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/histogram.h"
@@ skipping 1149 matching lines @@
 
       DevToolsManager::GetInstance()->AttachClientHost(
           iter->second, host->render_view_host());
       orphaned_dev_tools_.erase(iter);
       break;
     }
 
     case NotificationType::EXTENSION_PROCESS_TERMINATED: {
       DCHECK_EQ(profile_, Source<Profile>(source).ptr());
 
+      ExtensionHost* host = Details<ExtensionHost>(details).ptr();
+
+      // TODO(rafaelw): Remove this check and ExtensionHost::recently_deleted().
+      // This is only here to help track down crbug.com/49114.
+      ExtensionHost::HostPointerList::iterator iter =
+          ExtensionHost::recently_deleted()->begin();
+      for (; iter != ExtensionHost::recently_deleted()->end(); iter++) {
+        if (*iter == host) {
+          CHECK(host->GetURL().spec().size() + 2 != 0);
+          break;
+        }
+      }
+      if (iter == ExtensionHost::recently_deleted()->end())
+        CHECK(host->GetURL().spec().size() + 1 != 0);
+
       // Unload the entire extension. We want it to be in a consistent state:
       // either fully working or not loaded at all, but never half-crashed.
-      UnloadExtension(Details<ExtensionHost>(details).ptr()->extension()->id());
+      UnloadExtension(host->extension()->id());
       break;
     }
 
     default:
       NOTREACHED() << "Unexpected notification type.";
   }
 }
 
 bool ExtensionsService::HasApps() {
   if (!extensions_enabled_)
@@ skipping 187 matching lines @@
   // Finish installing on UI thread.
   ChromeThread::PostTask(
       ChromeThread::UI, FROM_HERE,
       NewRunnableMethod(
           frontend_,
           &ExtensionsService::ContinueLoadAllExtensions,
           extensions_to_reload,
           start_time,
           true));
 }