Non-Oilpan Memory: Fix HTMLViewSourceDocument and WebLeakDetector.

Source/bindings/core/v8/V8PerIsolateData.h

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 94 matching lines @@
     V8HiddenValue* hiddenValue() { return m_hiddenValue.get(); }
 
     v8::Local<v8::FunctionTemplate> domTemplate(const void* domTemplateKey, v8::FunctionCallback = 0, v8::Local<v8::Value> data = v8::Local<v8::Value>(), v8::Local<v8::Signature> = v8::Local<v8::Signature>(), int length = 0);
     v8::Local<v8::FunctionTemplate> existingDOMTemplate(const void* domTemplateKey);
     void setDOMTemplate(const void* domTemplateKey, v8::Local<v8::FunctionTemplate>);
 
     bool hasInstance(const WrapperTypeInfo* untrusted, v8::Local<v8::Value>);
     v8::Local<v8::Object> findInstanceInPrototypeChain(const WrapperTypeInfo*, v8::Local<v8::Value>);
 
     v8::Local<v8::Context> ensureScriptRegexpContext();
+    void clearScriptRegexpContext();
 
     const char* previousSamplingState() const { return m_previousSamplingState; }
     void setPreviousSamplingState(const char* name) { m_previousSamplingState = name; }
 
     // EndOfScopeTasks are run by V8RecursionScope when control is returning
     // to C++ from script, after executing a script task (e.g. callback,
     // event) or microtasks (e.g. promise). This is explicitly needed for
     // Indexed DB transactions per spec, but should in general be avoided.
     void addEndOfScopeTask(PassOwnPtr<EndOfScopeTask>);
     void runEndOfScopeTasks();
@@ skipping 34 matching lines @@
 #endif
     bool m_performingMicrotaskCheckpoint;
 
     Vector<OwnPtr<EndOfScopeTask>> m_endOfScopeTasks;
     OwnPtr<ScriptDebuggerBase> m_scriptDebugger;
 };
 
 } // namespace blink
 
 #endif // V8PerIsolateData_h