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

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index f9a53b0f1c8fad6a4720973812ab3ef0e2efb5d0..7aabab466d9e808b1c3d9880070e5c73e9a150aa 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -3039,7 +3039,7 @@
               '-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
@@ -3060,7 +3060,7 @@
               '-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