clang: Turn on C++11 on CrOs too.

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 3021 matching lines @@
               '-Wno-covered-switch-default',
 
               # Warns when a const char[] is converted to bool.
               '-Wstring-conversion',
             ],
             'cflags!': [
               # Clang doesn't seem to know know this flag.
               '-mfpmath=sse',
             ],
           }],
-          ['clang==1 and (OS!="android" and chromeos!=1)', {
+          ['clang==1 and OS!="android"', {
             # Turn on C++11.
             'cflags': [
               # This warns on using ints as initializers for floats in
               # initializer lists (e.g. |int a = f(); CGSize s = { a, a };|),
               # which happens in several places in chrome code. Not sure if
               # this is worth fixing.
               '-Wno-c++11-narrowing',
 
               # This warns about code like |"0x%08"NACL_PRIxPTR| -- with C++11
               # user-defined literals, this is now a string literal with a UD
               # suffix. However, this is used heavily in NaCl code, so disable
               # the warning for now.
               '-Wno-reserved-user-defined-literal',
             ],
             'cflags_cc': [
               # See the comment in the Mac section for what it takes to move
               # this to -std=c++11.
               '-std=gnu++11',
             ],
           }],
-          ['clang==1 and (OS=="android" or chromeos==1)', {
+          ['clang==1 and OS=="android"', {
             # Android uses gcc4.4, and clang isn't compatible with gcc4.4's
             # libstdc++ in C++11 mode. So no C++11 mode for Android yet.
             # Doesn't work with asan for some reason either: crbug.com/233464
             'cflags': [
               # Especially needed for gtest macros using enum values from Mac   
               # system headers. 
               # TODO(pkasting): In C++11 this is legal, so this should be       
               # removed when we change to that.  (This is also why we don't     
               # bother fixing all these cases today.)   
               '-Wno-unnamed-type-template-args',        
@@ skipping 1362 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }