C++ profiles processor: put under #ifdef and fix issues.

SConstruct

Index: SConstruct
diff --git a/SConstruct b/SConstruct
index d33b567ec191fe8cabf9baa34ca8d394dc68cdb7..8e73698ed0aa72ff040b8369a60705233c5c57d6 100644
--- a/SConstruct
+++ b/SConstruct
@@ -105,6 +105,9 @@ LIBRARY_FLAGS = {
     'profilingsupport:on': {
       'CPPDEFINES':   ['ENABLE_LOGGING_AND_PROFILING'],
     },
+    'cppprofilesprocessor:on': {
+      'CPPDEFINES':   ['ENABLE_CPP_PROFILES_PROCESSOR'],
+    },
     'debuggersupport:on': {
       'CPPDEFINES':   ['ENABLE_DEBUGGER_SUPPORT'],
     }
@@ -674,6 +677,11 @@ SIMPLE_OPTIONS = {
     'default': 'on',
     'help': 'enable profiling of JavaScript code'
   },
+  'cppprofilesprocessor': {
+    'values': ['on', 'off'],
+    'default': 'off',
+    'help': 'enable C++ profiles processor'
+  },
   'debuggersupport': {
     'values': ['on', 'off'],
     'default': 'on',