Switch to standard integer types in blimp/.

blimp/net/blimp_message_output_buffer_unittest.cc

Index: blimp/net/blimp_message_output_buffer_unittest.cc
diff --git a/blimp/net/blimp_message_output_buffer_unittest.cc b/blimp/net/blimp_message_output_buffer_unittest.cc
index 2278fb48b9f0886f2c1a2eccdc2ecfefe76fabec..93b27729f5216486bfc06297d161863d896072ec 100644
--- a/blimp/net/blimp_message_output_buffer_unittest.cc
+++ b/blimp/net/blimp_message_output_buffer_unittest.cc
@@ -46,7 +46,7 @@ class BlimpMessageOutputBufferTest : public testing::Test {
         .RetiresOnSaturation();
   }
 
-  BlimpMessage WithMessageId(const BlimpMessage& message, int64 message_id) {
+  BlimpMessage WithMessageId(const BlimpMessage& message, int64_t message_id) {
     BlimpMessage output = message;
     output.set_message_id(message_id);
     return output;