DevTools: clean up V8Debugger.h API, remove parts accessed only from within inspector/v8.

third_party/WebKit/Source/core/core.gypi

 {
     'includes': [
         'core_generated.gypi',
     ],
     'variables': {
         # Files for which bindings (.cpp and .h files) will be generated
         'core_idl_files': [
             'animation/KeyframeEffect.idl',
             'animation/EffectModel.idl',
             'animation/AnimationEffectReadOnly.idl',
@@ skipping 1798 matching lines @@
             'inspector/ScriptCallFrame.cpp',
             'inspector/ScriptCallFrame.h',
             'inspector/ScriptCallStack.cpp',
             'inspector/ScriptCallStack.h',
             'inspector/ThreadDebugger.cpp',
             'inspector/ThreadDebugger.h',
             'inspector/v8/EventListenerInfo.h',
             'inspector/v8/InspectorWrapper.cpp',
             'inspector/v8/InspectorWrapper.h',
             'inspector/v8/IgnoreExceptionsScope.h',
+            'inspector/v8/IgnoreExceptionsScope.cpp',
             'inspector/v8/JavaScriptCallFrame.cpp',
             'inspector/v8/JavaScriptCallFrame.h',
             'inspector/v8/ScriptBreakpoint.h',
             'inspector/v8/SourceMap.cpp',
             'inspector/v8/SourceMap.h',
             'inspector/v8/V8AsyncCallTracker.cpp',
             'inspector/v8/V8AsyncCallTracker.h',
             'inspector/v8/V8DebuggerAgent.h',
             'inspector/v8/V8DebuggerAgentImpl.cpp',
             'inspector/v8/V8DebuggerAgentImpl.h',
@@ skipping 2197 matching lines @@
             'style/SVGComputedStyleTest.cpp',
             'svg/SVGPathParserTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }