Tidy up some C-isms.

Change-Id: I53b457cab9067369320457549071fc3e4c23c81b
diff --git a/src/jdwp/jdwp_adb.cc b/src/jdwp/jdwp_adb.cc
index ae45f18..096ebc7 100644
--- a/src/jdwp/jdwp_adb.cc
+++ b/src/jdwp/jdwp_adb.cc
@@ -69,8 +69,8 @@
 
   socklen_t           controlAddrLen;
   union {
-    struct sockaddr_un  controlAddrUn;
-    struct sockaddr     controlAddrPlain;
+    sockaddr_un  controlAddrUn;
+    sockaddr     controlAddrPlain;
   } controlAddr;
 
   JdwpNetState() {
@@ -138,12 +138,12 @@
  * closes netState->controlSock.
  */
 static int  receiveClientFd(JdwpNetState*  netState) {
-  struct msghdr    msg;
-  struct cmsghdr*  cmsg;
+  msghdr    msg;
+  cmsghdr*  cmsg;
   iovec     iov;
   char             dummy = '!';
   union {
-    struct cmsghdr cm;
+    cmsghdr cm;
     char buffer[CMSG_SPACE(sizeof(int))];
   } cm_un;
   int              ret;