Change GetTotalReceivedBytes() from int64 to int64_t.

net/http/http_network_transaction_unittest.cc

Index: net/http/http_network_transaction_unittest.cc
diff --git a/net/http/http_network_transaction_unittest.cc b/net/http/http_network_transaction_unittest.cc
index d200a432e84ca28b28c118cb2752933cf0c9313e..633296a5f92953249bc0a8140f4cf4d4d150bbb0 100644
--- a/net/http/http_network_transaction_unittest.cc
+++ b/net/http/http_network_transaction_unittest.cc
@@ -13361,7 +13361,7 @@ class FakeStream : public HttpStream,
 
   bool CanReuseConnection() const override { return false; }
 
-  int64 GetTotalReceivedBytes() const override {
+  int64_t GetTotalReceivedBytes() const override {
     ADD_FAILURE();
     return 0;
   }
@@ -13577,7 +13577,7 @@ class FakeWebSocketBasicHandshakeStream : public WebSocketHandshakeStreamBase {
 
   bool CanReuseConnection() const override { return false; }
 
-  int64 GetTotalReceivedBytes() const override {
+  int64_t GetTotalReceivedBytes() const override {
     NOTREACHED();
     return 0;
   }