Plumb SSLKEYLOGFILE from Cronet to net

components/cronet/url_request_context_config.h

Index: components/cronet/url_request_context_config.h
diff --git a/components/cronet/url_request_context_config.h b/components/cronet/url_request_context_config.h
index 4031447d19d326505ca53fcc161db81431e2b41f..3c84b33c817d48e28b3d74c01fc9b157984bb085 100644
--- a/components/cronet/url_request_context_config.h
+++ b/components/cronet/url_request_context_config.h
@@ -8,10 +8,16 @@
 #include <string>
 
 #include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/time/time.h"
 #include "net/base/hash_value.h"
 
+namespace base {
+class SequencedTaskRunner;
+}  // namespace base
+
 namespace net {
 class CertVerifier;
 class NetLog;
@@ -107,7 +113,8 @@ struct URLRequestContextConfig {
   // Configure |context_builder| based on |this|.
   void ConfigureURLRequestContextBuilder(
       net::URLRequestContextBuilder* context_builder,
-      net::NetLog* net_log);
+      net::NetLog* net_log,
+      const scoped_refptr<base::SequencedTaskRunner>& file_task_runner);
 
   // Enable QUIC.
   const bool enable_quic;