mac: Fix a nesting bug in http://crrev.com/87141

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index fdbbc88222da9ceb32e8783020e9d95b8d05d6ff..189d4486bb5f19b521f005e4f7b553fc0e68f935 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -631,13 +631,13 @@
           'win_release_RuntimeLibrary%': '0', # 0 = /MT (nondebug static)
           'win_debug_RuntimeLibrary%': '1',   # 1 = /MTd (debug static)
         }],
+        ['OS=="mac" and clang==1', {
+          # TODO(thakis): Remove this once http://llvm.org/PR10031 is fixed.
+          'mac_release_optimization%': '2',
+        }],
       ],
     },
     'conditions': [
-      ['OS=="mac" and clang==1', {
-        # TODO(thakis): Remove this once http://llvm.org/PR10031 is fixed.
-        'mac_release_optimization%': '2',
-      }],
       ['branding=="Chrome"', {
         'defines': ['GOOGLE_CHROME_BUILD'],
       }, {  # else: branding!="Chrome"