Oilpan: add assert to verify eager finalization.

Source/platform/heap/ThreadState.cpp

Index: Source/platform/heap/ThreadState.cpp
diff --git a/Source/platform/heap/ThreadState.cpp b/Source/platform/heap/ThreadState.cpp
index e4c8669990f7e6c3652fdec1903c184ca9ddc586..5facbac9e165ec4863491482e0d8b784d839d2ef 100644
--- a/Source/platform/heap/ThreadState.cpp
+++ b/Source/platform/heap/ThreadState.cpp
@@ -88,14 +88,11 @@ ThreadState::ThreadState()
     , m_startOfStack(reinterpret_cast<intptr_t*>(StackFrameDepth::getStackStart()))
     , m_endOfStack(reinterpret_cast<intptr_t*>(StackFrameDepth::getStackStart()))
     , m_safePointScopeMarker(nullptr)
-    , m_atSafePoint(false)
     , m_interruptors()
-    , m_sweepForbidden(false)
     , m_noAllocationCount(0)
     , m_gcForbiddenCount(0)
     , m_vectorBackingHeapIndex(Vector1HeapIndex)
     , m_currentHeapAges(0)
-    , m_isTerminating(false)
     , m_gcMixinMarker(nullptr)
     , m_shouldFlushHeapDoesNotContainCache(false)
     , m_gcState(NoGCScheduled)
@@ -106,6 +103,12 @@ ThreadState::ThreadState()
 #if ENABLE(GC_PROFILING)
     , m_nextFreeListSnapshotTime(-std::numeric_limits<double>::infinity())
 #endif
+    , m_atSafePoint(false)
+    , m_isTerminating(false)
+    , m_isSweepForbidden(false)
+#if ENABLE(ASSERT)
+    , m_isEagerlySweeping(false)
+#endif
 {
     checkThread();
     ASSERT(!**s_threadSpecific);
@@ -651,7 +654,7 @@ void ThreadState::performIdleLazySweep(double deadlineSeconds)
         return;
 
     bool sweepCompleted = true;
-    ThreadState::SweepForbiddenScope scope(this);
+    SweepForbiddenScope scope(this);
     {
         if (isMainThread())
             ScriptForbiddenScope::enter();
@@ -983,7 +986,7 @@ void ThreadState::eagerSweep()
     if (sweepForbidden())
         return;
 
-    ThreadState::SweepForbiddenScope scope(this);
+    SweepForbiddenScope scope(this);
     {
         if (isMainThread())
             ScriptForbiddenScope::enter();
@@ -1007,7 +1010,7 @@ void ThreadState::completeSweep()
     if (sweepForbidden())
         return;
 
-    ThreadState::SweepForbiddenScope scope(this);
+    SweepForbiddenScope scope(this);
     {
         if (isMainThread())
             ScriptForbiddenScope::enter();