Update Source/platform/ to assume Oilpan only.

third_party/WebKit/Source/platform/MemoryPurgeController.cpp

Index: third_party/WebKit/Source/platform/MemoryPurgeController.cpp
diff --git a/third_party/WebKit/Source/platform/MemoryPurgeController.cpp b/third_party/WebKit/Source/platform/MemoryPurgeController.cpp
index be7caa7813d891d0d1fed4031dd425fa819fa974..170d6214b69f0f8560ce371ffaa7d890831e92a6 100644
--- a/third_party/WebKit/Source/platform/MemoryPurgeController.cpp
+++ b/third_party/WebKit/Source/platform/MemoryPurgeController.cpp
@@ -29,10 +29,6 @@ MemoryPurgeController::MemoryPurgeController()
 {
 }
 
-MemoryPurgeController::~MemoryPurgeController()
-{
-}
-
 void MemoryPurgeController::purgeMemory()
 {
     // TODO(bashi): Add UMA
@@ -44,9 +40,7 @@ void MemoryPurgeController::purgeMemory()
 
 DEFINE_TRACE(MemoryPurgeController)
 {
-#if ENABLE(OILPAN)
     visitor->trace(m_clients);
-#endif
 }
 
 } // namespace blink