Drop the global memory state from memory coordinator

content/browser/memory/memory_state_updater.h

Index: content/browser/memory/memory_state_updater.h
diff --git a/content/browser/memory/memory_state_updater.h b/content/browser/memory/memory_state_updater.h
index 2c8998a853054ac2caec1969905220538e438e6b..331264ae7f79c065394e8b1529cd3d4a2619202e 100644
--- a/content/browser/memory/memory_state_updater.h
+++ b/content/browser/memory/memory_state_updater.h
@@ -13,6 +13,9 @@
 
 namespace content {
 
+// TODO(bashi): Rename MemoryStateUpdater -> MemoryConditionObserver?
+// TODO(bashi): Update the comments.
+
 // MemoryStateUpdater is an internal implementation of MemoryCoordinator
 // which uses a heuristic to determine a single global memory state.
 // In the current implementation browser process and renderer processes share
@@ -35,13 +38,9 @@ class CONTENT_EXPORT MemoryStateUpdater {
                      scoped_refptr<base::SingleThreadTaskRunner> task_runner);
   ~MemoryStateUpdater();
 
-  // Calculates the next global state from the amount of free memory using
-  // a heuristic.
-  base::MemoryState CalculateNextState();
-
-  // Schedules a task to update the global state. The task will be executed
+  // Schedules a task to update memory condition. The task will be executed
   // after |delay| has passed.
-  void ScheduleUpdateState(base::TimeDelta delay);
+  void ScheduleUpdateCondition(base::TimeDelta delay);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(MemoryCoordinatorImplTest, CalculateNextState);
@@ -49,12 +48,16 @@ class CONTENT_EXPORT MemoryStateUpdater {
   FRIEND_TEST_ALL_PREFIXES(MemoryCoordinatorImplTest, SetMemoryStateForTesting);
   FRIEND_TEST_ALL_PREFIXES(MemoryCoordinatorImplTest, ForceSetGlobalState);
 
-  // Periodically called to update the global state.
-  void UpdateState();
+  // Calculates next memory condition from the amount of free memory using
+  // a heuristic.
+  MemoryCondition CalculateNextCondition();
+
+  // Periodically called to update the memory condition.
+  void UpdateCondition();
 
   MemoryCoordinatorImpl* coordinator_;
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-  base::CancelableClosure update_state_closure_;
+  base::CancelableClosure update_condition_closure_;
 
   // Sets up parameters for the heuristic.
   void InitializeParameters();
@@ -63,6 +66,7 @@ class CONTENT_EXPORT MemoryStateUpdater {
   bool ValidateParameters();
 
   // Parameters to control the heuristic.
+  // TODO(bashi): Rename these parameters.
 
   // The median size of a renderer on the current platform. This is used to
   // convert the amount of free memory to an expected number of new renderers