Gracefully handle child process death in out-of-process plugin loading.

content/browser/plugin_service.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 "content/browser/plugin_service.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
@@ skipping 490 matching lines @@
       base::Bind(&PluginService::GetPluginsInternal, base::Unretained(this),
           target_loop, callback));
 #else
   std::vector<webkit::WebPluginInfo> cached_plugins;
   if (webkit::npapi::PluginList::Singleton()->GetPluginsIfNoRefreshNeeded(
           &cached_plugins)) {
     // Can't assume the caller is reentrant.
     target_loop->PostTask(FROM_HERE,
         base::Bind(&RunGetPluginsCallback, callback, cached_plugins));
   } else {
+    if (!plugin_loader_.get())
+      plugin_loader_ = new PluginLoaderPosix;
     BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
-        base::Bind(&PluginLoaderPosix::LoadPlugins, target_loop, callback));
+        base::Bind(&PluginLoaderPosix::LoadPlugins, plugin_loader_,
+                   target_loop, callback));
   }
 #endif
 }
 
 void PluginService::GetPluginGroups(const GetPluginGroupsCallback& callback) {
   GetPlugins(base::Bind(&GetPluginsForGroupsCallback, callback));
 }
 
 void PluginService::GetPluginsInternal(
      base::MessageLoopProxy* target_loop,
@@ skipping 87 matching lines @@
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
 // static
 void PluginService::RegisterFilePathWatcher(
     FilePathWatcher *watcher,
     const FilePath& path,
     FilePathWatcher::Delegate* delegate) {
   bool result = watcher->Watch(path, delegate);
   DCHECK(result);
 }
 #endif