Change BrowserThreadDelegate to run Init() async.

content/browser/browser_thread_impl.cc

Index: content/browser/browser_thread_impl.cc
diff --git a/content/browser/browser_thread_impl.cc b/content/browser/browser_thread_impl.cc
index 422011422afa8f8bea82b63d680299980142ae86..0905f54d8cda8a3e74020a998a9197d581af2d96 100644
--- a/content/browser/browser_thread_impl.cc
+++ b/content/browser/browser_thread_impl.cc
@@ -103,8 +103,14 @@ void BrowserThreadImpl::Init() {
   AtomicWord stored_pointer = base::subtle::NoBarrier_Load(storage);
   BrowserThreadDelegate* delegate =
       reinterpret_cast<BrowserThreadDelegate*>(stored_pointer);
-  if (delegate)
+  if (delegate) {
     delegate->Init();
+    message_loop()->PostTask(FROM_HERE,
+                             base::Bind(&BrowserThreadDelegate::InitAsync,
+                                        // Delegate is expected to exist for the
+                                        // duration of the thread's lifetime
+                                        base::Unretained(delegate)));
+  }
 }
 
 // We disable optimizations for this block of functions so the compiler doesn't