align WebMemoryPressureLevel with MemoryPressureListener::MemoryPressureLevel

third_party/WebKit/public/platform/WebMemoryPressureLevel.h

 // Copyright 2016 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.
 
 #ifndef WebMemoryPressureLevel_h
 #define WebMemoryPressureLevel_h
 
+#include "base/memory/memory_pressure_listener.h"
+
 namespace blink {
 
 // These number must correspond to
 // base::MemoryPressureListener::MemoryPressureLevel.
 enum WebMemoryPressureLevel {
-    WebMemoryPressureLevelNone = -1,
-    WebMemoryPressureLevelModerate = 0,
-    WebMemoryPressureLevelCritical = 2,
+    WebMemoryPressureLevelNone,
+    WebMemoryPressureLevelModerate,
+    WebMemoryPressureLevelCritical,
 };
 
+static_assert(static_cast<WebMemoryPressureLevel>(

[bashi, 2016/06/23 05:07:37]

Can you put these static aseerts in RenderThreadImpl::OnMemoryPressure() ?

I don't think we can include base/memory/memory_pressure_listener.h from
WebKit/public/platform.

+    base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE) ==
+    WebMemoryPressureLevelNone, "none level not align");
+static_assert(static_cast<WebMemoryPressureLevel>(
+    base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_MODERATE) ==
+    WebMemoryPressureLevelModerate, "moderate level not align");
+static_assert(static_cast<WebMemoryPressureLevel>(
+    base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_CRITICAL) ==
+    WebMemoryPressureLevelCritical, "critical level not align");
+
 } // namespace blink
 
 #endif