Revert of Creates a BattOrConnection for communicating with the BattOr

tools/battor_agent/battor_agent_bin.cc

Index: tools/battor_agent/battor_agent_bin.cc
diff --git a/tools/battor_agent/battor_agent_bin.cc b/tools/battor_agent/battor_agent_bin.cc
index 5843ae906b10f6e3f97aaf7075808cda945e38ef..26c855c6e870107755917d4f2e70524799f53ce0 100644
--- a/tools/battor_agent/battor_agent_bin.cc
+++ b/tools/battor_agent/battor_agent_bin.cc
@@ -49,7 +49,7 @@
 std::string GetArg(int argnum, int argc, char* argv[]) {
   if (argnum >= argc) {
     PrintUsage();
-    exit(1);
+    PLOG(FATAL);
   }
 
   return argv[argnum];
@@ -58,13 +58,16 @@
 // Checks if an error occurred and, if it did, prints the error and exits
 // with an error code.
 void CheckError(battor::BattOrError error) {
-  if (error != battor::BATTOR_ERROR_NONE)
-    LOG(FATAL) << "Fatal error when communicating with the BattOr: " << error;
+  if (error != battor::BATTOR_ERROR_NONE) {
+    LOG(ERROR) << "Fatal error when communicating with the BattOr: " << error;
+    PLOG(FATAL);
+  }
 }
 
 // Prints an error message and exits due to a required thread failing to start.
 void ExitFromThreadStartFailure(const std::string& thread_name) {
-  LOG(FATAL) << "Failed to start " << thread_name;
+  LOG(ERROR) << "Failed to start " << thread_name;
+  PLOG(FATAL);
 }
 
 }  // namespace
@@ -81,7 +84,9 @@
         file_thread_(kFileThreadName),
         ui_thread_(kUiThreadName) {}
 
-  ~BattOrAgentBin() { DCHECK(!agent_); }
+  ~BattOrAgentBin() {
+    DCHECK(!agent_);
+  }
 
   // Runs the BattOr binary and returns the exit code.
   int Run(int argc, char* argv[]) {