Revert 289403 "Update iOS deployment target to 7.0"

trunk/src/build/common.gypi

Index: trunk/src/build/common.gypi
===================================================================
--- trunk/src/build/common.gypi	(revision 289509)
+++ trunk/src/build/common.gypi	(working copy)
@@ -1618,7 +1618,7 @@
         # not using the "current" SDK.
         'ios_sdk%': '',
         'ios_sdk_path%': '',
-        'ios_deployment_target%': '7.0',
+        'ios_deployment_target%': '6.0',
 
         'conditions': [
           # ios_product_name is set to the name of the .app bundle as it should
@@ -5020,10 +5020,6 @@
                   'CLANG_CXX_LIBRARY': 'libc++',  # -stdlib=libc++
                 }]
               ],
-            }, {
-              # The default for deployment target of 7.0+ is libc++, so force
-              # the old behavior unless libc++ is enabled.
-              'CLANG_CXX_LIBRARY': 'libstdc++',  # -stdlib=libstdc++
             }],
           ],
         },