Push bleeding_edge@1391 and bleeding_edge@1392 to trunk.

src/log.cc

Index: src/log.cc
===================================================================
--- src/log.cc	(revision 1393)
+++ src/log.cc	(working copy)
@@ -386,7 +386,9 @@
 // Write the log message to the log file currently opened.
 void LogMessageBuilder::WriteToLogFile() {
   ASSERT(pos_ <= Logger::kMessageBufferSize);
-  fwrite(Logger::message_buffer_, 1, pos_, Logger::logfile_);
+  size_t rv = fwrite(Logger::message_buffer_, 1, pos_, Logger::logfile_);
+  ASSERT(rv == static_cast<size_t>(pos_));
+  USE(rv);
 }
 #endif