Update mojo sdk to rev e7270700d671fa8e458b4d8c9e47f7bcfb65da0b

third_party/mojo/src/mojo/public/cpp/environment/lib/default_task_tracker.cc

Index: third_party/mojo/src/mojo/public/cpp/environment/lib/default_task_tracker.cc
diff --git a/third_party/mojo/src/mojo/public/cpp/environment/lib/default_task_tracker.cc b/third_party/mojo/src/mojo/public/cpp/environment/lib/default_task_tracker.cc
new file mode 100644
index 0000000000000000000000000000000000000000..17c814db679d77ec457e813da0aadca47452480f
--- /dev/null
+++ b/third_party/mojo/src/mojo/public/cpp/environment/lib/default_task_tracker.cc
@@ -0,0 +1,38 @@
+// Copyright 2015 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.
+
+#include "mojo/public/cpp/environment/lib/default_task_tracker.h"
+
+namespace mojo {
+
+namespace {
+
+//
+// The standalone task tracker does nothing.
+//
+
+TaskTrackingId StartTracking(const char* function_name,
+                             const char* file_name,
+                             int line_number,
+                             const void* program_counter) {
+  return TaskTrackingId(0);
+}
+
+void EndTracking(const TaskTrackingId id) {
+}
+
+void SetEnabled(bool enabled) {
+}
+
+}  // namespace
+
+namespace internal {
+
+const TaskTracker kDefaultTaskTracker = {&StartTracking,
+                                         &EndTracking,
+                                         &SetEnabled};
+
+}  // namespace internal
+
+}  // namespace mojo