Fixup lint flags.

The -build/include setting was masking out build/include_what_you_use. This CL
restores them, fixes any build errors, and adds NOLINT as needed. As well,
the runtime/explicit and runtime/printf flags are aslo enabled and NOLINT'd.
lint cleanups

Change-Id: Ib013b3eb29c8d0e48cad74c5df9028684130719f
Reviewed-on: https://pdfium-review.googlesource.com/2030
Reviewed-by: Tom Sepez <tsepez@chromium.org>
diff --git a/fpdfsdk/javascript/JS_EventHandler.h b/fpdfsdk/javascript/JS_EventHandler.h
index fb0e637..8cfcfa7 100644
--- a/fpdfsdk/javascript/JS_EventHandler.h
+++ b/fpdfsdk/javascript/JS_EventHandler.h
@@ -60,7 +60,7 @@
 
 class CJS_EventHandler {
  public:
-  CJS_EventHandler(CJS_Context* pContext);
+  explicit CJS_EventHandler(CJS_Context* pContext);
   virtual ~CJS_EventHandler();
 
   void OnApp_Init();