Add C++ Trace Event support to PPAPI/NaCl SDK

ppapi/ppapi_cpp.gypi

 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Shared source lists between trusted and untrusted targets are stored in 
 # ppapi_sources.gypi.
 
 {
   'includes': [
     'ppapi_sources.gypi',
@@ skipping 28 matching lines @@
           'msvs_settings': {
             'VCCLCompilerTool': {
               'AdditionalOptions': ['/we4244'],  # implicit conversion, possible loss of data
             },
           },
           'msvs_disabled_warnings': [
             4267,
           ],      
         }],
         ['OS=="linux"', {
-          'cflags': ['-Wextra', '-pedantic'],
+          'cflags': [
+            '-Wextra',
+            '-pedantic',
+            '-Wno-variadic-macros',
+            '-Wno-long-long'],
         }],
         ['OS=="mac"', {
           'xcode_settings': {
             'WARNING_CFLAGS': ['-Wextra', '-pedantic'],
            },
         }],
       ],
     },
     {
       'target_name': 'ppapi_cpp',
@@ skipping 15 matching lines @@
         }],
         ['OS=="mac"', {
           'xcode_settings': {
             'WARNING_CFLAGS': ['-Wextra', '-pedantic'],
            },
         }]
       ],
     },
   ],
 }