Add JS heap snapshotting functionality to Telemetry (part 2)

tools/telemetry/telemetry/core/heap/model.py

Index: tools/telemetry/telemetry/core/heap/model.py
diff --git a/tools/telemetry/telemetry/core/heap/model.py b/tools/telemetry/telemetry/core/heap/model.py
new file mode 100644
index 0000000000000000000000000000000000000000..8ce70f7ab64b2a7258c2d4e8edddc24d4c7bf86c
--- /dev/null
+++ b/tools/telemetry/telemetry/core/heap/model.py
@@ -0,0 +1,21 @@
+# Copyright 2013 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from telemetry.core.heap import chrome_js_heap_snapshot_parser
+
+class Model(object):
+  """ The heap snapshot model is a set of LiveHeapObjects. The LiveHeapObjects
+  contain the RetainingEdge objects describing the relationships between the
+  LiveHeapObjects."""
+
+  def __init__(self, raw_data):
+    if not chrome_js_heap_snapshot_parser.ChromeJsHeapSnapshotParser.CanImport(
+        raw_data):
+      raise ValueError("Cannot import snapshot data")
+    parser = chrome_js_heap_snapshot_parser.ChromeJsHeapSnapshotParser(raw_data)
+    self._all_live_heap_objects = parser.GetAllLiveHeapObjects()
+
+  @property
+  def all_live_heap_objects(self):
+    return self._all_live_heap_objects