discardable_memory: Using mojo IPC to replace Chrome IPC

components/discardable_memory/public/interfaces/discardable_memory.mojom

Index: components/discardable_memory/public/interfaces/discardable_memory.mojom
diff --git a/components/discardable_memory/public/interfaces/discardable_memory.mojom b/components/discardable_memory/public/interfaces/discardable_memory.mojom
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index 0000000000000000000000000000000000000000..ed3e873ec5e61b5cc5921575791502ca25b98cc6
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+++ b/components/discardable_memory/public/interfaces/discardable_memory.mojom
@@ -0,0 +1,14 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.

[reveman, 2016/11/11 20:17:26]

should the name of this file be "discardable_shared_memory_manager.mojom" ?

[Peng, 2016/11/11 22:50:35]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+module discardable_memory.mojom;
+
+interface DiscardableSharedMemoryManager {
+  // Allocate a locked discardable share memory.

[reveman, 2016/11/11 20:17:26]

s/discardable share memory/discardable shared memory segment/

[Peng, 2016/11/11 22:50:35]

Done.

+  AllocateLockedDiscardableSharedMemory(
+      uint32 size,
+      int32 id) => (handle<shared_buffer> memory);
+  // Notify a discardable shared memory is deleted.

[reveman, 2016/11/11 20:17:26]

"Notify manager that a memory segment has been deleted"?

[Peng, 2016/11/11 22:50:35]

Done.

+  DeletedDiscardableSharedMemory(int32 id);
+};