Fix code style violation in compiler/preprocessor

BUG=angle:650
TEST=no behavior change

Change-Id: Ib52f15f6471fc7897b66d11baee11216cf08158a
Reviewed-on: https://chromium-review.googlesource.com/199591
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Tested-by: Zhenyao Mo <zmo@chromium.org>
diff --git a/src/compiler/preprocessor/Lexer.h b/src/compiler/preprocessor/Lexer.h
index eb85cea..d42d3db 100644
--- a/src/compiler/preprocessor/Lexer.h
+++ b/src/compiler/preprocessor/Lexer.h
@@ -17,7 +17,7 @@
   public:
     virtual ~Lexer();
 
-    virtual void lex(Token* token) = 0;
+    virtual void lex(Token *token) = 0;
 };
 
 }  // namespace pp