Oilpan: Factor out GC-related enum definitions to BlinkGC.h

third_party/WebKit/Source/platform/heap/SafePoint.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SafePoint_h
 #define SafePoint_h
 
 #include "platform/heap/ThreadState.h"
 #include "wtf/ThreadingPrimitives.h"
 
 namespace blink {
 
 class SafePointScope final {
     WTF_MAKE_NONCOPYABLE(SafePointScope);
 public:
-    explicit SafePointScope(ThreadState::StackState stackState, ThreadState* state = ThreadState::current())
+    explicit SafePointScope(BlinkGC::StackState stackState, ThreadState* state = ThreadState::current())
         : m_state(state)
     {
         if (m_state) {
             RELEASE_ASSERT(!m_state->isAtSafePoint());
             m_state->enterSafePoint(stackState, this);
         }
     }
 
     ~SafePointScope()
     {
         if (m_state)
             m_state->leaveSafePoint();
     }
 
 private:
     ThreadState* m_state;
 };
 
 // The SafePointAwareMutexLocker is used to enter a safepoint while waiting for
 // a mutex lock. It also ensures that the lock is not held while waiting for a GC
 // to complete in the leaveSafePoint method, by releasing the lock if the
 // leaveSafePoint method cannot complete without blocking, see
 // SafePointBarrier::checkAndPark.
 class SafePointAwareMutexLocker final {
     WTF_MAKE_NONCOPYABLE(SafePointAwareMutexLocker);
 public:
-    explicit SafePointAwareMutexLocker(MutexBase& mutex, ThreadState::StackState stackState = ThreadState::HeapPointersOnStack)
+    explicit SafePointAwareMutexLocker(MutexBase& mutex, BlinkGC::StackState stackState = BlinkGC::HeapPointersOnStack)
         : m_mutex(mutex)
         , m_locked(false)
     {
         ThreadState* state = ThreadState::current();
         do {
             bool leaveSafePoint = false;
             // We cannot enter a safepoint if we are currently sweeping. In that
             // case we just try to acquire the lock without being at a safepoint.
             // If another thread tries to do a GC at that time it might time out
             // due to this thread not being at a safepoint and waiting on the lock.
@@ skipping 69 matching lines @@
     volatile int m_canResume;
     volatile int m_unparkedThreadCount;
     Mutex m_mutex;
     ThreadCondition m_parked;
     ThreadCondition m_resume;
 };
 
 } // namespace blink
 
 #endif