Fix browser crash on shutdown when ProfileImplIOData::Handle::Init isn't called.

chrome/browser/profiles/profile_impl_io_data.cc

Index: chrome/browser/profiles/profile_impl_io_data.cc
diff --git a/chrome/browser/profiles/profile_impl_io_data.cc b/chrome/browser/profiles/profile_impl_io_data.cc
index ae9af7527cec077532776e4ab4602d7b27df6529..b796df3dcbf7d2c226c3bcce8c3f051605dd81e6 100644
--- a/chrome/browser/profiles/profile_impl_io_data.cc
+++ b/chrome/browser/profiles/profile_impl_io_data.cc
@@ -132,7 +132,11 @@ ProfileImplIOData::Handle::~Handle() {
   if (io_data_->http_server_properties_manager_)
     io_data_->http_server_properties_manager_->ShutdownOnPrefThread();
 
-  io_data_->data_reduction_proxy_io_data()->ShutdownOnUIThread();
+  // io_data_->data_reduction_proxy_io_data() might be NULL if Init() was
+  // never called.
+  if (io_data_->data_reduction_proxy_io_data())
+    io_data_->data_reduction_proxy_io_data()->ShutdownOnUIThread();
+
   io_data_->ShutdownOnUIThread(GetAllContextGetters().Pass());
 }