Remove content/public/plugin and chrome/plugin

content/public/app/content_main_delegate.cc

Index: content/public/app/content_main_delegate.cc
diff --git a/content/public/app/content_main_delegate.cc b/content/public/app/content_main_delegate.cc
index 57f04f7f81009b08df5b5941cffa9b58636b54f1..d833cb0abc2dfd00634163a0118e648d3ee23a52 100644
--- a/content/public/app/content_main_delegate.cc
+++ b/content/public/app/content_main_delegate.cc
@@ -7,7 +7,6 @@
 #include "build/build_config.h"
 
 #include "content/public/gpu/content_gpu_client.h"
-#include "content/public/plugin/content_plugin_client.h"
 #include "content/public/renderer/content_renderer_client.h"
 #include "content/public/utility/content_utility_client.h"
 
@@ -71,14 +70,6 @@ ContentGpuClient* ContentMainDelegate::CreateContentGpuClient() {
 #endif
 }
 
-ContentPluginClient* ContentMainDelegate::CreateContentPluginClient() {
-#if defined(CHROME_MULTIPLE_DLL_BROWSER)
-  return NULL;
-#else
-  return new ContentPluginClient();
-#endif
-}
-
 ContentRendererClient* ContentMainDelegate::CreateContentRendererClient() {
 #if defined(CHROME_MULTIPLE_DLL_BROWSER)
   return NULL;