debugd: Fix coding style and cpplint issues.

BUG=chromium:385849
TEST=`FEATURES=test emerge-$BOARD platform2`
TEST=`cpplint.py --root=src --filter=-build/include src/{*.h,*.cc,*/*.cc}`

Change-Id: Ia2475d6ee287dc727c3b2ffe139e9cc8bfe2e2e5
Reviewed-on: https://chromium-review.googlesource.com/204391
Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
diff --git a/debugd/src/ping_tool.h b/debugd/src/ping_tool.h
index cb44182..abc8ae1 100644
--- a/debugd/src/ping_tool.h
+++ b/debugd/src/ping_tool.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef PING_TOOL_H
-#define PING_TOOL_H
+#ifndef PING_TOOL_H_
+#define PING_TOOL_H_
 
 #include <map>
 #include <string>
@@ -18,14 +18,14 @@
 class PingTool : public SubprocessTool {
  public:
   PingTool();
-  ~PingTool();
+  virtual ~PingTool();
 
   std::string Start(const DBus::FileDescriptor& outfd,
                     const std::string& destination,
                     const std::map<std::string, DBus::Variant>& options,
-                    DBus::Error& error);
+                    DBus::Error* error);
 };
 
-};  // namespace debugd
+}  // namespace debugd
 
-#endif  // PING_TOOL_H
+#endif  // PING_TOOL_H_