[RemotePlayback] No monitoring on low-end devices

third_party/WebKit/Source/platform/MemoryCoordinator.h

Index: third_party/WebKit/Source/platform/MemoryCoordinator.h
diff --git a/third_party/WebKit/Source/platform/MemoryCoordinator.h b/third_party/WebKit/Source/platform/MemoryCoordinator.h
index c5d7579ee18f6c33994ae162d0f7fa58e52d47dd..bb2ab3fa3c758757875fe409c239372aaaaec73e 100644
--- a/third_party/WebKit/Source/platform/MemoryCoordinator.h
+++ b/third_party/WebKit/Source/platform/MemoryCoordinator.h
@@ -32,8 +32,16 @@ class PLATFORM_EXPORT MemoryCoordinator final
 
  public:
   static MemoryCoordinator& instance();
+
+  // Whether the device Blink runs on is a low-end device.
+  // Can be overridden in layout tests via internals.
   static bool isLowEndDevice();
 
+  // Caches whether this device is a low-end device in a static member.
+  // instance() is not used as it's a heap allocated object - meaning it's not
+  // thread-safe as well as might break tests counting the heap size.
+  static void initialize();
+
   void registerClient(MemoryCoordinatorClient*);
   void unregisterClient(MemoryCoordinatorClient*);
 
@@ -46,10 +54,16 @@ class PLATFORM_EXPORT MemoryCoordinator final
   DECLARE_TRACE();
 
  private:
+  friend class Internals;
+
+  static void setIsLowEndDeviceForTesting(bool);
+
   MemoryCoordinator();
 
   void clearMemory();
 
+  static bool s_isLowEndDevice;
+
   HeapHashSet<WeakMember<MemoryCoordinatorClient>> m_clients;
 };