NotForReview: Expose the global memory budget (chromium side)

content/browser/memory/memory_coordinator_impl.h

Index: content/browser/memory/memory_coordinator_impl.h
diff --git a/content/browser/memory/memory_coordinator_impl.h b/content/browser/memory/memory_coordinator_impl.h
index ba9bcf3a392919036d355de9a74bd179e03c2998..818ca0654cf22f1ba986c2a4d0d19104b307398a 100644
--- a/content/browser/memory/memory_coordinator_impl.h
+++ b/content/browser/memory/memory_coordinator_impl.h
@@ -19,6 +19,7 @@
 #include "content/public/browser/memory_coordinator_delegate.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "mojo/public/cpp/system/buffer.h"
 
 namespace content {
 
@@ -80,6 +81,8 @@ class CONTENT_EXPORT MemoryCoordinatorImpl : public base::MemoryCoordinator,
 
   // base::MemoryCoordinator implementations:
   MemoryState GetCurrentMemoryState() const override;
+  int64_t GetGlobalBudget() override;
+  void SetGlobalBudgetUpdateInterval(uint32_t interval_ms) override;
 
   // content::MemoryCoordinator implementation:
   MemoryState GetStateForProcess(base::ProcessHandle handle) override;
@@ -103,6 +106,9 @@ class CONTENT_EXPORT MemoryCoordinatorImpl : public base::MemoryCoordinator,
   // like purging memory and memory state changes.
   void UpdateConditionIfNeeded(MemoryCondition condition);
 
+  // Updates the global memory budget.
+  void UpdateGlobalBudget(int budget);
+
   // Asks the delegate to discard a tab.
   void DiscardTab();
 
@@ -212,6 +218,9 @@ class CONTENT_EXPORT MemoryCoordinatorImpl : public base::MemoryCoordinator,
   // disconnected.
   ChildInfoMap children_;
 
+  mojo::ScopedSharedBufferHandle global_budget_handle_;
+  mojo::ScopedSharedBufferMapping global_budget_mapping_;
+
   DISALLOW_COPY_AND_ASSIGN(MemoryCoordinatorImpl);
 };