Move renderer plugin code into a new component.

chrome/chrome_renderer.gypi

Index: chrome/chrome_renderer.gypi
diff --git a/chrome/chrome_renderer.gypi b/chrome/chrome_renderer.gypi
index a4949ee7880ae6184d6d76ff0ab92a1568348860..dabf7daeef6972e519a192f3827a80642c9167dd 100644
--- a/chrome/chrome_renderer.gypi
+++ b/chrome/chrome_renderer.gypi
@@ -15,6 +15,7 @@
         'chrome_resources.gyp:chrome_strings',
         '../components/components.gyp:autofill_content_renderer',
         '../components/components.gyp:startup_metric_utils',
+        '../components/components.gyp:plugins_renderer',
         '../components/components.gyp:visitedlink_renderer',
         '../content/content.gyp:content_renderer',
         '../net/net.gyp:net',
@@ -263,12 +264,10 @@
         'renderer/pepper/ppb_nacl_private_impl.h',
         'renderer/pepper/ppb_pdf_impl.cc',
         'renderer/pepper/ppb_pdf_impl.h',
-        'renderer/plugins/plugin_placeholder.cc',
-        'renderer/plugins/plugin_placeholder.h',
+        'renderer/plugins/chrome_plugin_placeholder.cc',
+        'renderer/plugins/chrome_plugin_placeholder.h',
         'renderer/plugins/plugin_uma.cc',
         'renderer/plugins/plugin_uma.h',
-        'renderer/plugins/webview_plugin.cc',
-        'renderer/plugins/webview_plugin.h',
         'renderer/prerender/prerender_dispatcher.cc',
         'renderer/prerender/prerender_dispatcher.h',
         'renderer/prerender/prerender_extra_data.cc',
@@ -424,9 +423,6 @@
             'renderer/extensions/tabs_custom_bindings.cc',
             'renderer/extensions/tts_custom_bindings.cc',
           ],
-          'defines': [
-            'ENABLE_MOBILE_YOUTUBE_PLUGIN',
-          ],
         }],
         ['OS=="win"', {
           'include_dirs': [