Split ppapi::PluginList from PepperPluginRegistry so that DRT could load pepper plugins.

content/browser/ppapi_plugin_process_host.h

Index: content/browser/ppapi_plugin_process_host.h
===================================================================
--- content/browser/ppapi_plugin_process_host.h	(revision 101488)
+++ content/browser/ppapi_plugin_process_host.h	(working copy)
@@ -15,8 +15,6 @@
 #include "content/browser/renderer_host/pepper_message_filter.h"
 #include "net/base/network_change_notifier.h"
 
-struct PepperPluginInfo;
-
 namespace content {
 class ResourceContext;
 }
@@ -25,6 +23,12 @@
 class HostResolver;
 }
 
+namespace webkit {
+namespace ppapi {
+struct PluginInfo;
+}
+}
+
 class PpapiPluginProcessHost
     : public BrowserChildProcessHost,
       public net::NetworkChangeNotifier::IPAddressObserver,
@@ -53,7 +57,7 @@
 
   // Actually launches the process with the given plugin info. Returns true
   // on success (the process was spawned).
-  bool Init(const PepperPluginInfo& info);
+  bool Init(const webkit::ppapi::PluginInfo& info);
 
   // Opens a new channel to the plugin. The client will be notified when the
   // channel is ready or if there's an error.