Introduce the support required to test a Kasko-enabled build on Swarm.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 7c927479548bf3815d4203c5676c2d09777850a4..41ce88a49f774f8b39572c79eda27b580a15e1a8 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -416,9 +416,6 @@
       # See https://code.google.com/p/sawbuck/wiki/SyzyASanHowTo
       'syzyasan%': 0,
 
-      # Enable crash reporting via Kasko.
-      'kasko%': 0,
-
       # Enable building with LSan (Clang's -fsanitize=leak option).
       # -fsanitize=leak only works with clang, but lsan=1 implies clang=1
       # See https://sites.google.com/a/chromium.org/dev/developers/testing/leaksanitizer
@@ -1011,6 +1008,14 @@
         }, {
           'sas_dll_path%': '<(DEPTH)/third_party/platformsdk_win7/files/redist/x86',
         }],
+
+        # Enable crash reporting via Kasko.
+        ['OS=="win" and target_arch=="ia32"', {
+          'kasko%': 0,

[csharp, 2015/05/01 20:08:12]

Is this suppose to be the same value in both places?

[erikwright (departed), 2015/05/04 15:06:07]

This doesn't need to be in the current CL.

+        }, {
+          'kasko%': 0,
+        }],
+
       ],
 
       # Setting this to '0' will cause V8's startup snapshot to be