Request debug headers and log URL correctly

Merged from https://widevine-internal-review.googlesource.com/165861

We want debug headers to help diagnose b/186031735. I also
saw that we were only logging the domain name for some
errors instead of the full URL.

Bug: 186031735
Test: GtsMediaTestCases
Change-Id: I4d469a73e54f86d4d3b5d50bd0030fdb2a36df50

libwvdrmengine/cdm/core/test/http_socket.cpp

@@ -328,14 +328,13 @@ bool HttpSocket::Connect(int timeout_in_ms) {
   } else {
     if (GetError() != ERROR_ASYNC_COMPLETE) {
       // failed right away.
-      LOGE("cannot connect to %s, errno = %d", domain_name_.c_str(),
-           GetError());
+      LOGE("cannot connect to %s, errno = %d", url().c_str(), GetError());
       CloseSocket();
       return false;
     } else {
       // in progress.  block until timeout expired or connection established.
       if (!Wait(/* for_read */ false, timeout_in_ms)) {
-        LOGE("cannot connect to %s", domain_name_.c_str());
+        LOGE("cannot connect to %s", url().c_str());
         CloseSocket();
         return false;
       }