[translate] Add translate ranker model loader.

net/url_request/url_request_context_getter.cc

Index: net/url_request/url_request_context_getter.cc
diff --git a/net/url_request/url_request_context_getter.cc b/net/url_request/url_request_context_getter.cc
index 0bad74812804739ecd53fae8180316ed33213818..f8a280cce023f1f6c656f07ecf911844a1c0271a 100644
--- a/net/url_request/url_request_context_getter.cc
+++ b/net/url_request/url_request_context_getter.cc
@@ -5,6 +5,7 @@
 #include "net/url_request/url_request_context_getter.h"
 
 #include "base/debug/leak_annotations.h"
+#include "base/debug/stack_trace.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "net/url_request/url_request_context.h"
@@ -12,6 +13,18 @@
 
 namespace net {
 
+void URLRequestContextGetter::AddRef() const {
+  base::debug::StackTrace().Print();
+  base::RefCountedThreadSafe<URLRequestContextGetter,
+                             URLRequestContextGetterTraits>::AddRef();
+}
+
+void URLRequestContextGetter::Release() const {
+  base::debug::StackTrace().Print();
+  base::RefCountedThreadSafe<URLRequestContextGetter,
+                             URLRequestContextGetterTraits>::Release();
+}
+
 void URLRequestContextGetter::AddObserver(
     URLRequestContextGetterObserver* observer) {
   DCHECK(GetNetworkTaskRunner()->BelongsToCurrentThread());
@@ -26,7 +39,9 @@ void URLRequestContextGetter::RemoveObserver(
 
 URLRequestContextGetter::URLRequestContextGetter() {}
 
-URLRequestContextGetter::~URLRequestContextGetter() {}
+URLRequestContextGetter::~URLRequestContextGetter() {
+  LOG(ERROR) << "I am being deleted now";
+}
 
 void URLRequestContextGetter::OnDestruct() const {
   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner =