Decoupling visibility states from webcontent, adding visibility management in ResourceManager

athena/resource_manager/public/resource_manager.h

Index: athena/resource_manager/public/resource_manager.h
diff --git a/athena/resource_manager/public/resource_manager.h b/athena/resource_manager/public/resource_manager.h
index be07b6e6f33986e926d971b6fb74bc7fb783b02d..8bc7a6077d7f9276e39a09e59d36d30a203937f6 100644
--- a/athena/resource_manager/public/resource_manager.h
+++ b/athena/resource_manager/public/resource_manager.h
@@ -31,10 +31,29 @@ class ResourceManager {
   virtual void SetMemoryPressureAndStopMonitoring(
       MemoryPressureObserver::MemoryPressure pressure) = 0;
 
+  // Disable the resource manager temporarily if |pause| is set. This can be

[oshima, 2014/09/04 16:39:23]

"Disable" may be misleading. How about just say "Pauses" or "Suspends"?

[Mr4D (OOO till 08-26), 2014/09/04 19:10:57]

Done.

+  // called before e.g. re-arranging the order of activities. Once called with
+  // |pause| == false any queued operations will be performed and the resource
+  // manager will continue its work.
+  virtual void Pause(bool pause) = 0;
+
  private:
   DISALLOW_COPY_AND_ASSIGN(ResourceManager);
 };
 
+// Use this scoped object to pause/restart the resource manager.
+class ScopedPauseResourceManager {
+ public:
+  ScopedPauseResourceManager() {
+    ResourceManager::Get()->Pause(true);
+  }
+  ~ScopedPauseResourceManager() {
+    ResourceManager::Get()->Pause(false);
+  }
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ScopedPauseResourceManager);
+};
+
 }  // namespace athena
 
 #endif  // ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_H_