Remove a bunch of NPAPI quirks and related support code

content/common/plugin_constants_win.h

Index: content/common/plugin_constants_win.h
diff --git a/content/common/plugin_constants_win.h b/content/common/plugin_constants_win.h
index 815cbf4ab95f8f1d63016bc7a62c0e12723ed6f1..5363868c6cce5686672d722889ab4561871d1d24 100644
--- a/content/common/plugin_constants_win.h
+++ b/content/common/plugin_constants_win.h
@@ -14,8 +14,6 @@
 
 namespace content {
 
-extern const base::char16 kDummyActivationWindowName[];
-
 // The name of the registry key which NPAPI plugins update on installation.
 extern const base::char16 kRegistryMozillaPlugins[];
 
@@ -24,17 +22,9 @@ extern const base::char16 kNewWMPPlugin[];
 extern const base::char16 kOldWMPPlugin[];
 extern const base::char16 kYahooApplicationStatePlugin[];
 extern const base::char16 kWanWangProtocolHandlerPlugin[];
-extern const base::char16 kFlashPlugin[];
-extern const base::char16 kAcrobatReaderPlugin[];
-extern const base::char16 kRealPlayerPlugin[];
-extern const base::char16 kSilverlightPlugin[];
 extern const base::char16 kJavaPlugin1[];
 extern const base::char16 kJavaPlugin2[];
 
-extern const char kGPUPluginMimeType[];
-
-extern const base::char16 kPluginDummyParentProperty[];
-
 }  // namespace content
 
 #endif  // CONTENT_COMMON_PLUGIN_CONSTANTS_WIN_H_