Add perf test configuration to track memory use of context and isolate.

test/memory/Memory.json

Index: test/memory/Memory.json
diff --git a/test/memory/Memory.json b/test/memory/Memory.json
new file mode 100644
index 0000000000000000000000000000000000000000..addaf73b51924f7989f17acdd2d33c1f0cef68b1
--- /dev/null
+++ b/test/memory/Memory.json
@@ -0,0 +1,27 @@
+{
+  "name": "Memory",
+  "run_count": 5,
+  "units": "bytes",
+  "path" : ["."],
+  "binary": "mksnapshot",
+  "flags": ["snapshot.cc", "--profile-deserialization"],
+  "main": "",
+  "tests": [
+    {
+      "name": "ReservedMemoryIsolate",
+      "results_regexp": "(\\d+) bytes per isolate$"
+    },
+    {
+      "name": "ReservedMemoryContext",
+      "results_regexp": "(\\d+) bytes per context$"
+    },
+    {
+      "name": "SnapshotSizeStartup",
+      "results_regexp": "(\\d+) bytes for startup$"
+    },
+    {
+      "name": "SnapshotSizeStartup",
+      "results_regexp": "(\\d+) bytes for context$"
+    }
+  ]
+}