Add IsCurrentlyLowMemory

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 c8e137b01507cb8905aa481c3084201cb5ad6995..3149524763d6eea867d4e8707878392c7f7f92b5 100644
--- a/third_party/WebKit/Source/platform/MemoryCoordinator.h
+++ b/third_party/WebKit/Source/platform/MemoryCoordinator.h
@@ -45,6 +45,11 @@ class PLATFORM_EXPORT MemoryCoordinator final
   // Override the value of the physical memory for testing.
   static void SetPhysicalMemoryMBForTesting(int64_t);
 
+  // Returns true when available memory is low.
+  // This is not cheap and should not be called repeatedly.
+  // TODO(keishi): Remove when MemoryState is ready.
+  static bool IsCurrentlyLowMemory();
+
   // Caches whether this device is a low-end device and the device physical
   // memory in static members. instance() is not used as it's a heap allocated
   // object - meaning it's not thread-safe as well as might break tests counting