Do not print C++ line numbers for Java logging.

webrtc/base/logging.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 114 matching lines @@
     print_stream_ << "[" << std::setfill('0') << std::setw(3) << (time / 1000)
                   << ":" << std::setw(3) << (time % 1000) << std::setfill(' ')
                   << "] ";
   }
 
   if (thread_) {
     PlatformThreadId id = CurrentThreadId();
     print_stream_ << "[" << std::dec << id << "] ";
   }
 
-  print_stream_ << "(" << FilenameFromPath(file)  << ":" << line << "): ";
+  if (file != NULL)
+    print_stream_ << "(" << FilenameFromPath(file)  << ":" << line << "): ";
 
   if (err_ctx != ERRCTX_NONE) {
     std::ostringstream tmp;
     tmp << "[0x" << std::setfill('0') << std::hex << std::setw(8) << err << "]";
     switch (err_ctx) {
       case ERRCTX_ERRNO:
         tmp << " " << strerror(err);
         break;
 #if WEBRTC_WIN
       case ERRCTX_HRESULT: {
@@ skipping 407 matching lines @@
   }
 
   if (state) {
     state->unprintable_count_[input] = consecutive_unprintable;
   }
 }
 
 //////////////////////////////////////////////////////////////////////
 
 }  // namespace rtc