Runtime configuration system for skia.  This will allow developers to control settings at launch time without relying on compile-time flags or recompilation.  It can be used to turn features on and off, as well as to control numeric quantities to 'tune' algorithms.  Once I make sure it's working across all platforms I'll send out a quick tutorial on its use.

Review URL: https://codereview.appspot.com/7098051

git-svn-id: http://skia.googlecode.com/svn/trunk@7158 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/common.gypi b/gyp/common.gypi
index 7dc27da..810a0f8 100644
--- a/gyp/common.gypi
+++ b/gyp/common.gypi
@@ -82,6 +82,7 @@
         'defines': [
           'SK_DEBUG',
           'GR_DEBUG=1',
+          'SK_DEVELOPER=1',
         ],
       },
       'Release': {
@@ -90,6 +91,12 @@
           'GR_RELEASE=1',
         ],
       },
+      'Release_Developer': {
+        'inherit_from': ['Release'],
+        'defines': [
+          'SK_DEVELOPER=1',
+        ],
+      },
     },
   }, # end 'target_defaults'
 }