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

R=machenbach@chromium.org

Review URL: https://codereview.chromium.org/1075143002

Cr-Commit-Position: refs/heads/master@{#27738}

.gitignore

@@ -53,6 +53,7 @@ shell_g
 /test/benchmarks/kraken
 /test/benchmarks/octane
 /test/benchmarks/sunspider
+/test/memory/snapshot.cc
 /test/mozilla/CHECKED_OUT_VERSION
 /test/mozilla/data
 /test/mozilla/data.old

test/memory/Memory.json

+{
+  "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$"
+    },
+    {
+      "name": "SnapshotSizeStartup",
+      "results_regexp": "(\\d+) bytes for context$"
+    }
+  ]
+}

tools/run_perf.py

@@ -411,8 +411,8 @@ def MakeGraph(suite, arch, parent):
   if isinstance(parent, Runnable):
     # Below a runnable can only be traces.
     return Trace(suite, parent, arch)
-  elif suite.get("main"):
-    # A main file makes this graph runnable.
+  elif suite.get("main") is not None:
+    # A main file makes this graph runnable. Empty strings are accepted.
     if suite.get("tests"):
       # This graph has subgraphs (traces).
       return Runnable(suite, parent, arch)