Oilpan: Reduce the reserved size of CallbackStacks

third_party/WebKit/Source/platform/heap/ThreadState.cpp

Index: third_party/WebKit/Source/platform/heap/ThreadState.cpp
diff --git a/third_party/WebKit/Source/platform/heap/ThreadState.cpp b/third_party/WebKit/Source/platform/heap/ThreadState.cpp
index 2b953d83646578b3e9c5c7f0e7d59d4642783a4a..b01a257b8c9684468353f3ac34edd2f6a15d798f 100644
--- a/third_party/WebKit/Source/platform/heap/ThreadState.cpp
+++ b/third_party/WebKit/Source/platform/heap/ThreadState.cpp
@@ -124,7 +124,7 @@ ThreadState::ThreadState()
     m_likelyToBePromptlyFreed = adoptArrayPtr(new int[likelyToBePromptlyFreedArraySize]);
     clearHeapAges();
 
-    m_threadLocalWeakCallbackStack = new CallbackStack();
+    m_threadLocalWeakCallbackStack = new CallbackStack(isMainThread() ? 1024 : 128);
 }
 
 ThreadState::~ThreadState()
@@ -484,6 +484,8 @@ void ThreadState::threadLocalWeakProcessing()
     // Perform thread-specific weak processing.
     while (popAndInvokeThreadLocalWeakCallback(&weakProcessingVisitor)) { }
 
+    ASSERT(m_threadLocalWeakCallbackStack->isEmpty());
+
     if (isMainThread()) {
         double timeForThreadLocalWeakProcessing = WTF::currentTimeMS() - startTime;
         DEFINE_STATIC_LOCAL(CustomCountHistogram, timeForWeakHistogram, ("BlinkGC.timeForThreadLocalWeakProcessing", 1, 10 * 1000, 50));