Split out fallback stack limit determination.

third_party/WebKit/Source/platform/heap/StackFrameDepth.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 StackFrameDepth_h
 #define StackFrameDepth_h
 
 #include "platform/PlatformExport.h"
 #include "wtf/Allocator.h"
 #include "wtf/Assertions.h"
@@ skipping 70 matching lines @@
     }
 #if COMPILER(MSVC)
 #pragma warning(pop)
 #endif
 
 private:
     // The maximum depth of eager, unrolled trace() calls that is
     // considered safe and allowed.
     static const int kSafeStackFrameSize = 32 * 1024;
 
+    static uintptr_t getFallbackStackLimit();
+
     static uintptr_t s_stackFrameLimit;
 #if ENABLE(ASSERT)
     static bool s_isEnabled;
     static bool s_isUsingFallbackStackSize;
 #endif
 };
 
 class StackFrameDepthScope {
     STACK_ALLOCATED();
     WTF_MAKE_NONCOPYABLE(StackFrameDepthScope);
 public:
     StackFrameDepthScope()
     {
         StackFrameDepth::enableStackLimit();
         ASSERT(StackFrameDepth::isSafeToRecurse());
     }
 
     ~StackFrameDepthScope()
     {
         StackFrameDepth::disableStackLimit();
     }
 };
 
 } // namespace blink
 
 #endif // StackFrameDepth_h