Have PNaCl use debug pexe URL instead of stripped pexe w/ kEnableNaClDebug

ppapi/native_client/src/trusted/plugin/pnacl_options.h

Index: ppapi/native_client/src/trusted/plugin/pnacl_options.h
diff --git a/ppapi/native_client/src/trusted/plugin/pnacl_options.h b/ppapi/native_client/src/trusted/plugin/pnacl_options.h
index df2a9aa171f0af0eaf30a57b7fc2f617a0058c81..2d30c3b32780ef28fa71056509680d9913bf449c 100644
--- a/ppapi/native_client/src/trusted/plugin/pnacl_options.h
+++ b/ppapi/native_client/src/trusted/plugin/pnacl_options.h
@@ -25,6 +25,9 @@ class PnaclOptions {
   bool translate() const { return translate_; }
   void set_translate(bool t) { translate_ = t; }
 
+  bool is_debug() const { return is_debug_; }
+  void set_debug(bool t) { is_debug_ = t; }
+
   int32_t opt_level() const { return opt_level_; }
   void set_opt_level(int32_t l);
 
@@ -33,6 +36,7 @@ class PnaclOptions {
   // Currently the default copy constructor is good enough, but
   // double-check that it is the case when more fields are added.
   bool translate_;
+  bool is_debug_;
   int32_t opt_level_;
 };