Move WIN32 define from standalone.gypi to common.gypi

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index cd8d98eeb7e58f41362bae41337b0f4458f99cae..e372af6f8533f53d0f2f30b0566a8695d7940c63 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -208,6 +208,11 @@
           'COMPRESS_STARTUP_DATA_BZ2',
         ],
       }],
+      ['OS=="win"', {
+        'defines': [
+          'WIN32',
+        ],
+      }],
       ['OS=="win" and v8_enable_prof==1', {
         'msvs_settings': {
           'VCLinkerTool': {
@@ -227,7 +232,7 @@
       ['OS=="solaris"', {
         'defines': [ '__C99FEATURES__=1' ],  # isinf() etc.
       }],
-    ],
+    ],  # conditions
     'configurations': {
       'Debug': {
         'defines': [
@@ -268,7 +273,7 @@
                         '-Wnon-virtual-dtor' ],
           }],
         ],
-      },
+      },  # Debug
       'Release': {
         'conditions': [
           ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="netbsd" \
@@ -308,7 +313,7 @@
               # is specified explicitly.
               'GCC_STRICT_ALIASING': 'YES',
             },
-          }],
+          }],  # OS=="mac"
           ['OS=="win"', {
             'msvs_configuration_attributes': {
               'OutputDirectory': '<(DEPTH)\\build\\$(ConfigurationName)',
@@ -343,9 +348,9 @@
                 # 'StackReserveSize': '297152',
               },
             },
-          }],
-        ],
-      },
-    },
-  },
+          }],  # OS=="win"
+        ],  # conditions
+      },  # Release
+    },  # configurations
+  },  # target_defaults
 }