Update from https://crrev.com/328418

base/mac/memory_pressure_monitor_mac_unittest.cc

Index: base/mac/memory_pressure_monitor_mac_unittest.cc
diff --git a/base/mac/memory_pressure_monitor_mac_unittest.cc b/base/mac/memory_pressure_monitor_mac_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..24ee09aeee1cef3b80b8a46bcdcd323a5d269926
--- /dev/null
+++ b/base/mac/memory_pressure_monitor_mac_unittest.cc
@@ -0,0 +1,59 @@
+// 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 "base/mac/memory_pressure_monitor_mac.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+
+class TestMemoryPressureMonitorMac : public MemoryPressureMonitorMac {
+ public:
+  using MemoryPressureMonitorMac::MemoryPressureLevelForMacMemoryPressure;
+
+  TestMemoryPressureMonitorMac() { }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TestMemoryPressureMonitorMac);
+};
+
+TEST(TestMemoryPressureMonitorMac, MemoryPressureFromMacMemoryPressure) {
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(
+                    DISPATCH_MEMORYPRESSURE_NORMAL));
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(
+                    DISPATCH_MEMORYPRESSURE_WARN));
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(
+                    DISPATCH_MEMORYPRESSURE_CRITICAL));
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(0));
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(3));
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(5));
+  EXPECT_EQ(MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE,
+            TestMemoryPressureMonitorMac::
+                MemoryPressureLevelForMacMemoryPressure(-1));
+}
+
+TEST(TestMemoryPressureMonitorMac, CurrentMemoryPressure) {
+  TestMemoryPressureMonitorMac monitor;
+  MemoryPressureListener::MemoryPressureLevel memory_pressure =
+      monitor.GetCurrentPressureLevel();
+  EXPECT_TRUE(memory_pressure ==
+                  MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE ||
+              memory_pressure ==
+                  MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE ||
+              memory_pressure ==
+                  MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL);
+}
+
+}  // namespace base