DevTools: extract Blink-independent part of CPU profiler into V8ProfilerAgent

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 1750 matching lines @@
             'inspector/v8/V8Debugger.h',
             'inspector/v8/V8DebuggerClient.h',
             'inspector/v8/V8DebuggerImpl.cpp',
             'inspector/v8/V8DebuggerImpl.h',
             'inspector/v8/V8DebuggerListener.cpp',
             'inspector/v8/V8DebuggerListener.h',
             'inspector/v8/V8InjectedScriptHost.cpp',
             'inspector/v8/V8InjectedScriptHost.h',
             'inspector/v8/V8JavaScriptCallFrame.cpp',
             'inspector/v8/V8JavaScriptCallFrame.h',
+            'inspector/v8/V8ProfilerAgent.h',
+            'inspector/v8/V8ProfilerAgentImpl.cpp',
+            'inspector/v8/V8ProfilerAgentImpl.h',
             'inspector/v8/V8RuntimeAgent.h',
             'inspector/v8/V8RuntimeAgentImpl.cpp',
             'inspector/v8/V8RuntimeAgentImpl.h',
             'inspector/WorkerConsoleAgent.cpp',
             'inspector/WorkerConsoleAgent.h',
             'inspector/WorkerDebuggerAgent.cpp',
             'inspector/WorkerDebuggerAgent.h',
             'inspector/WorkerInspectorController.cpp',
             'inspector/WorkerInspectorController.h',
             'inspector/WorkerRuntimeAgent.cpp',
@@ skipping 2125 matching lines @@
             'style/OutlineValueTest.cpp',
             'style/SVGComputedStyleTest.cpp',
             'svg/UnsafeSVGAttributeSanitizationTest.cpp',
             'testing/PrivateScriptTestTest.cpp',
             'timing/MemoryInfoTest.cpp',
             'workers/WorkerThreadTest.cpp',
             'xml/parser/SharedBufferReaderTest.cpp',
         ],
     }
 }