Enable internal gold for ChromeOS.

BUG=None
TEST=Manual: chrome builds with chromeos=1 on a 64-bit machine without a system gold binary.

Review URL: https://chromiumcodereview.appspot.com/9325068

git-svn-id: http://src.chromium.org/svn/trunk/src/build@120762 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

common.gypi

@@ -378,9 +378,8 @@
         }],
 
         # Set to 0 to not use third_party/gold as the linker.
-        # On by default for x64 Linux.  Off for ChromeOS as cross-compiling
-        # makes things complicated.
-        ['chromeos==0 and host_arch=="x64"', {
+        # On by default for x64 Linux.
+        ['host_arch=="x64"', {
           'linux_use_gold_binary%': 1,
         }, {
           'linux_use_gold_binary%': 0,