Oilpan: Remove most WillBe types from the code base

third_party/WebKit/Source/platform/MemoryPurgeController.h

Index: third_party/WebKit/Source/platform/MemoryPurgeController.h
diff --git a/third_party/WebKit/Source/platform/MemoryPurgeController.h b/third_party/WebKit/Source/platform/MemoryPurgeController.h
index a23fcc71fa4b741a113a8be762757ae0ddbb09a7..f1308a5f36145c0982d6c305e200b0811b7718f8 100644
--- a/third_party/WebKit/Source/platform/MemoryPurgeController.h
+++ b/third_party/WebKit/Source/platform/MemoryPurgeController.h
@@ -21,7 +21,7 @@ enum class DeviceKind {
 // interface to be informed when they should reduce memory consumption.
 // MemoryPurgeController assumes that subclasses of MemoryPurgeClient are
 // WillBes.
-class PLATFORM_EXPORT MemoryPurgeClient : public WillBeGarbageCollectedMixin {
+class PLATFORM_EXPORT MemoryPurgeClient : public GarbageCollectedMixin {
 public:
     virtual ~MemoryPurgeClient() { }
 
@@ -36,13 +36,12 @@ public:
 // for reducing memory consumption and notifies its clients.
 // Since we want to control memory per tab, MemoryPurgeController is owned by
 // Page.
-class PLATFORM_EXPORT MemoryPurgeController final : public NoBaseWillBeGarbageCollectedFinalized<MemoryPurgeController> {
-    USING_FAST_MALLOC_WILL_BE_REMOVED(MemoryPurgeController);
+class PLATFORM_EXPORT MemoryPurgeController final : public GarbageCollectedFinalized<MemoryPurgeController> {
     WTF_MAKE_NONCOPYABLE(MemoryPurgeController);
 public:
     static void onMemoryPressure(WebMemoryPressureLevel);
 
-    static PassOwnPtrWillBeRawPtr<MemoryPurgeController> create()
+    static RawPtr<MemoryPurgeController> create()
     {
         return adoptPtrWillBeNoop(new MemoryPurgeController);
     }
@@ -71,7 +70,7 @@ public:
 private:
     MemoryPurgeController();
 
-    WillBeHeapHashSet<RawPtrWillBeWeakMember<MemoryPurgeClient>> m_clients;
+    HeapHashSet<WeakMember<MemoryPurgeClient>> m_clients;
     DeviceKind m_deviceKind;
 };