Revert 111695 - Have content/ create and destroy its own threads.

content/shell/shell_browser_main.cc

Index: content/shell/shell_browser_main.cc
===================================================================
--- content/shell/shell_browser_main.cc	(revision 111697)
+++ content/shell/shell_browser_main.cc	(working copy)
@@ -40,9 +40,41 @@
 }
 
 ShellBrowserMainParts::~ShellBrowserMainParts() {
+  base::ThreadRestrictions::SetIOAllowed(true);
+    io_thread()->message_loop()->PostTask(
+        FROM_HERE, base::IgnoreReturn<bool>(
+            base::Bind(&base::ThreadRestrictions::SetIOAllowed, true)));
+
+  browser_context_.reset();
+
+  resource_dispatcher_host_->download_file_manager()->Shutdown();
+  resource_dispatcher_host_->save_file_manager()->Shutdown();
+  resource_dispatcher_host_->Shutdown();
+  io_thread_.reset();
+  cache_thread_.reset();
+  process_launcher_thread_.reset();
+  file_thread_.reset();
+  resource_dispatcher_host_.reset();  // Kills WebKit thread.
+  db_thread_.reset();
 }
 
-void ShellBrowserMainParts::PreCreateThreads() {
+void ShellBrowserMainParts::PreMainMessageLoopRun() {
+  db_thread_.reset(new BrowserProcessSubThread(BrowserThread::DB));
+  db_thread_->Start();
+  file_thread_.reset(new BrowserProcessSubThread(BrowserThread::FILE));
+  file_thread_->Start();
+  process_launcher_thread_.reset(
+      new BrowserProcessSubThread(BrowserThread::PROCESS_LAUNCHER));
+  process_launcher_thread_->Start();
+
+  base::Thread::Options options;
+  options.message_loop_type = MessageLoop::TYPE_IO;
+
+  cache_thread_.reset(new BrowserProcessSubThread(BrowserThread::CACHE));
+  cache_thread_->StartWithOptions(options);
+  io_thread_.reset(new BrowserProcessSubThread(BrowserThread::IO));
+  io_thread_->StartWithOptions(options);
+
   browser_context_.reset(new ShellBrowserContext(this));
 
   Shell::PlatformInitialize();
@@ -53,24 +85,9 @@
                          NULL,
                          MSG_ROUTING_NONE,
                          NULL);
-}
 
-void ShellBrowserMainParts::PostMainMessageLoopRun() {
-  browser_context_.reset();
-
-  resource_dispatcher_host_->download_file_manager()->Shutdown();
-  resource_dispatcher_host_->save_file_manager()->Shutdown();
-  resource_dispatcher_host_->Shutdown();
 }
 
-void ShellBrowserMainParts::PreStopThread(BrowserThread::ID id) {
-  if (id == BrowserThread::WEBKIT) {
-    // It remains the embedder's responsibility to kill the WebKit
-    // thread.  This happens when RDH is destroyed.
-    resource_dispatcher_host_.reset();
-  }
-}
-
 bool ShellBrowserMainParts::MainMessageLoopRun(int* result_code) {
   return false;
 }