Add per-configuration flags that were previously being set by the
Hammer infrastructure.
Review URL: http://codereview.chromium.org/56179

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@13012 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/build/common.gypi b/build/common.gypi
index 5ff11c5..db85641c 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -169,6 +169,22 @@
           'HOME',
           'LINK',
         ],
+        'configurations': {
+          'Debug': {
+            'defines': [
+              '_DEBUG',
+            ],
+            'cflags': [
+              '-O0',
+              '-g',
+            ],
+          },
+          'Release': {
+            'cflags': [
+              '-O2',
+            ],
+          },
+        },
       },
     }],
     ['OS=="mac"', {