[DevTools] Follow up with cleanups for InjectedScript::Scope.

third_party/WebKit/Source/platform/v8_inspector/IgnoreExceptionsScope.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 IgnoreExceptionsScope_h
-#define IgnoreExceptionsScope_h
-
-#include "platform/inspector_protocol/Allocator.h"
-#include "platform/v8_inspector/V8DebuggerImpl.h"
-#include "wtf/OwnPtr.h"
-
-namespace blink {
-
-class IgnoreExceptionsScope {
-    PROTOCOL_DISALLOW_COPY(IgnoreExceptionsScope);
-public:
-    explicit IgnoreExceptionsScope(V8DebuggerImpl* debugger)
-        : m_debugger(debugger)
-        , m_previousPauseOnExceptionsState(V8DebuggerImpl::DontPauseOnExceptions)
-    {
-        m_previousPauseOnExceptionsState = setPauseOnExceptionsState(V8DebuggerImpl::DontPauseOnExceptions);
-    }
-
-    ~IgnoreExceptionsScope()
-    {
-        setPauseOnExceptionsState(m_previousPauseOnExceptionsState);
-    }
-
-private:
-    V8DebuggerImpl::PauseOnExceptionsState setPauseOnExceptionsState(V8DebuggerImpl::PauseOnExceptionsState newState)
-    {
-        if (!m_debugger || !m_debugger->enabled())
-            return newState;
-        V8DebuggerImpl::PauseOnExceptionsState presentState = m_debugger->getPauseOnExceptionsState();
-        if (presentState != newState)
-            m_debugger->setPauseOnExceptionsState(newState);
-        return presentState;
-    }
-
-    V8DebuggerImpl* m_debugger;
-    V8DebuggerImpl::PauseOnExceptionsState m_previousPauseOnExceptionsState;
-};
-
-} // namespace blink
-
-#endif // IgnoreExceptionsScope_h