CHECK that IOBuffer::data_ in AsyncResourceHandler is not NULL before caching it.

BUG=http://crbug.com/16371

Review URL: http://codereview.chromium.org/159730

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22214 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/renderer_host/async_resource_handler.cc

@@ -141,6 +141,8 @@ bool AsyncResourceHandler::OnResponseCompleted(
   if (g_spare_read_buffer) {
     read_buffer_ = NULL;
   } else if (read_buffer_.get()) {
+    // TODO(willchan): Remove after debugging bug 16371.
+    CHECK(read_buffer_->data());
     read_buffer_.swap(&g_spare_read_buffer);
   }
   return true;