Expose MemoryCoordinator's global budget information.

content/browser/memory/memory_coordinator.h

Index: content/browser/memory/memory_coordinator.h
diff --git a/content/browser/memory/memory_coordinator.h b/content/browser/memory/memory_coordinator.h
index 682f1ba628142c1a9a001c14a97179a1c8b5c3a9..0061b0d14f7e7dd541ec1b692bd95b9307b65183 100644
--- a/content/browser/memory/memory_coordinator.h
+++ b/content/browser/memory/memory_coordinator.h
@@ -48,6 +48,12 @@ class CONTENT_EXPORT MemoryCoordinator {
   bool SetMemoryState(
       int render_process_id, mojom::MemoryState memory_state);
 
+  // Dispatches a remaining global budget change to the provided process.
+  // Returns true if the process is tracked by this coordinator and successfully
+  // dispatches, false otherwise.
+  bool SetRemainingGlobalBudget(
+      int render_process_id, int64_t remaining_global_budget_mb);
+
   // Returns the memory state of the specified render process. Returns UNKNOWN
   // if the process is not tracked by this coordinator.
   mojom::MemoryState GetMemoryState(int render_process_id) const;
@@ -58,6 +64,13 @@ class CONTENT_EXPORT MemoryCoordinator {
   virtual base::MemoryState GetCurrentMemoryState() const;
   virtual void SetCurrentMemoryStateForTesting(base::MemoryState memory_state);
 
+  // Returns the remaining global budget usable in aggregate by all Chrome
+  // processes. This indicates how many MB of memory are remaining for Chrome
+  // processes to use before the memory coordinator will take efforts to reclaim
+  // memory. A negative amount indicates that the coordinator is actively trying
+  // to reclaim that much memory.
+  virtual int64_t GetRemainingGlobalBudget() const;
+
  protected:
   // Constructor. Protected as this is a singleton, but accessible for
   // unittests.