NotForReview: Expose the global memory budget (chromium side)

content/common/memory_coordinator.mojom

 // 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.
 
 module content.mojom;
 
 import "content/common/child_memory_coordinator.mojom";
 
 // An interface to access the central memory coordinator from a child process.
 // The browser process creates a handle for each child process.
 interface MemoryCoordinatorHandle {
   // A child process calls this method when ChildMemoryCoordinator is created.
   AddChild(ChildMemoryCoordinator child);
+
+  // Gets a shared memory handle for the global memory budget. A child
+  // process calls this method when ChildMemoryCoordinator is created.
+  GetGlobalBudgetHandle() => (handle<shared_buffer> budget_handle);
+
+  // TODO(bashi): Tentative.
+  // Sets an interval for a task to update the global memory budget.
+  SetGlobalBudgetUpdateInterval(uint32 interval_ms);
 };