Fixes for PNaCl build of remoting client plugin in chromium.

webrtc/base/systeminfo.cc

 /*
  *  Copyright 2008 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 161 matching lines @@
     memory = status.ullTotalPhys;
   } else {
     LOG_GLE(LS_WARNING) << "GlobalMemoryStatusEx failed.";
   }
 
 #elif defined(WEBRTC_MAC)
   size_t len = sizeof(memory);
   int error = sysctlbyname("hw.memsize", &memory, &len, NULL, 0);
   if (error || memory == 0)
     memory = -1;
-#else  // WEBRTC_LINUX
+#elif defined(WEBRTC_LINUX)
   memory = static_cast<int64>(sysconf(_SC_PHYS_PAGES)) *
       static_cast<int64>(sysconf(_SC_PAGESIZE));
   if (memory < 0) {
     LOG(LS_WARNING) << "sysconf(_SC_PHYS_PAGES) failed."
                     << "sysconf(_SC_PHYS_PAGES) " << sysconf(_SC_PHYS_PAGES)
                     << "sysconf(_SC_PAGESIZE) " << sysconf(_SC_PAGESIZE);
     memory = -1;
   }
 #endif
 
@@ skipping 11 matching lines @@
   int error = sysctlbyname("hw.model", buffer, &length, NULL, 0);
   if (!error)
     return std::string(buffer, length - 1);
   return std::string();
 #else
   return "Not available";
 #endif
 }
 
 }  // namespace rtc