Remove kLogPluginMessages flag as part of flag cleanup

content/public/common/content_switches.h

 // Copyright (c) 2012 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.
 
 // Defines all the "content" command-line switches.
 
 #ifndef CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 #define CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_
 
 #include "build/build_config.h"
@@ skipping 175 matching lines @@
 extern const char kGpuVendorID[];
 CONTENT_EXPORT extern const char kHostResolverRules[];
 CONTENT_EXPORT extern const char kIgnoreCertificateErrors[];
 CONTENT_EXPORT extern const char kIgnoreGpuBlacklist[];
 extern const char kInProcessGPU[];
 CONTENT_EXPORT extern const char kJavaScriptFlags[];
 extern const char kLoadPlugin[];
 CONTENT_EXPORT extern const char kLogGpuControlListDecisions[];
 CONTENT_EXPORT extern const char kLoggingLevel[];
 CONTENT_EXPORT extern const char kLogNetLog[];
-extern const char kLogPluginMessages[];
 extern const char kMaxUntiledLayerHeight[];
 extern const char kMaxUntiledLayerWidth[];
 extern const char kMemoryMetrics[];
 CONTENT_EXPORT extern const char kMuteAudio[];
 CONTENT_EXPORT extern const char kNoReferrers[];
 CONTENT_EXPORT extern const char kNoSandbox[];
 CONTENT_EXPORT extern const char kNumRasterThreads[];
 CONTENT_EXPORT extern const char kOverscrollHistoryNavigation[];
 extern const char kPluginLauncher[];
 CONTENT_EXPORT extern const char kPluginPath[];
@@ skipping 91 matching lines @@
 extern const char kEnableCarbonInterposing[];
 extern const char kDisableCoreAnimationPlugins[];
 #endif
 
 // DON'T ADD RANDOM STUFF HERE. Put it in the main section above in
 // alphabetical order, or in one of the ifdefs (also in order in each section).
 
 }  // namespace switches
 
 #endif  // CONTENT_PUBLIC_COMMON_CONTENT_SWITCHES_H_