DevTools: Turn InspectorFrontendHostAPI.Events into symbols.

third_party/WebKit/Source/devtools/scripts/compile_frontend.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 401 matching lines @@
     '--js', to_platform_path(debugger_script_source_name)
 ]
 
 debuggerScriptCompileProc = popen(command)
 
 print 'Compiling devtools.js...'
 
 command = spawned_compiler_command + [
     '--externs', to_platform_path(global_externs_file),
     '--externs', to_platform_path(path.join(devtools_frontend_path, 'host', 'InspectorFrontendHostAPI.js')),
+    '--jscomp_off=externsValidation',
     '--module', jsmodule_name_prefix + 'devtools_js' + ':1',
     '--js', to_platform_path(path.join(devtools_frontend_path, 'devtools.js'))
 ]
 devtoolsJSCompileProc = popen(command)
 
 print 'Verifying JSDoc comments...'
 additional_jsdoc_check_files = [injectedScriptSourceTmpFile]
 errors_found |= verify_jsdoc(additional_jsdoc_check_files)
 jsdocValidatorProc, jsdocValidatorFileList = verify_jsdoc_extra(additional_jsdoc_check_files)
 
@@ skipping 83 matching lines @@
 print 'Validate InjectedScriptSource.js output:%s' % os.linesep, (validateInjectedScriptOut if validateInjectedScriptOut else '<empty>')
 errors_found |= hasErrors(validateInjectedScriptOut)
 
 if errors_found:
     print 'ERRORS DETECTED'
 
 os.remove(injectedScriptSourceTmpFile)
 os.remove(compiler_args_file.name)
 os.remove(protocol_externs_file)
 shutil.rmtree(modules_dir, True)