Do not initiate Oilpan GC if under known stack pressure.

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 26 matching lines @@
         s_stackFrameLimit = 0;
 #if ENABLE(ASSERT)
         s_isEnabled = false;
 #endif
     }
 
 #if ENABLE(ASSERT)
     inline static bool isEnabled() { return s_isEnabled; }
 #endif
 
+    static bool hasInsufficientStackForGC();
+
     static size_t getUnderestimatedStackSize();
     static void* getStackStart();
 
 #if COMPILER(MSVC)
 // Ignore C4172: returning address of local variable or temporary: dummy. This
 // warning suppression has to go outside of the function to take effect.
 #pragma warning(push)
 #pragma warning(disable: 4172)
 #endif
     static uintptr_t currentStackFrame(const char* dummy = nullptr)
@@ skipping 34 matching lines @@
 
     ~StackFrameDepthScope()
     {
         StackFrameDepth::disableStackLimit();
     }
 };
 
 } // namespace blink
 
 #endif // StackFrameDepth_h