Add support for external out-of-process PPAPI plugins in the browser.

content/common/view_messages.h

Index: content/common/view_messages.h
===================================================================
--- content/common/view_messages.h	(revision 166155)
+++ content/common/view_messages.h	(working copy)
@@ -1947,27 +1947,29 @@
                             IPC::ChannelHandle /* handle to channel */,
                             int /* plugin_child_id */)
 
-// Notification that a native (non-NaCl) plugin has created a new plugin
-// instance. The parameters indicate the plugin process ID that we're creating
-// the instance for, and the routing ID of the render view that the plugin
-// instance is associated with. This allows us to create a mapping in the
-// browser process for what objects a given PP_Instance is associated with.
+// Notification that a plugin has created a new plugin instance. The parameters
+// indicate the plugin process ID that we're creating the instance for, and the
+// routing ID of the render view that the plugin instance is associated with.
+// This allows us to create a mapping in the browser process for what objects a
+// given PP_Instance is associated with.
 //
 // This message must be sync even though it returns no parameters to avoid
 // a race condition with the plugin process. The plugin process sends messages
 // to the browser that assume the browser knows about the instance. We need to
-// sure that the browser actually knows about the instance before we tell the
-// plugin to run.
-IPC_SYNC_MESSAGE_CONTROL3_0(ViewHostMsg_DidCreateOutOfProcessPepperInstance,
+// make sure that the browser actually knows about the instance before we tell
+// the plugin to run.
+IPC_SYNC_MESSAGE_CONTROL4_0(ViewHostMsg_DidCreateOutOfProcessPepperInstance,
                             int /* plugin_child_id */,
                             int32 /* pp_instance */,
-                            int /* view_routing_id */)
+                            int /* view_routing_id */,
+                            bool /* is_external */)
 
-// Notification that a native (non-NaCl) plugin has destroyed an instance. This
-// is the opposite if the "DidCreate" version above.
-IPC_MESSAGE_CONTROL2(ViewHostMsg_DidDeleteOutOfProcessPepperInstance,
+// Notification that a plugin has destroyed an instance. This is the opposite of
+// the "DidCreate" message above.
+IPC_MESSAGE_CONTROL3(ViewHostMsg_DidDeleteOutOfProcessPepperInstance,
                      int /* plugin_child_id */,
-                     int32 /* pp_instance */)
+                     int32 /* pp_instance */,
+                     bool /* is_external */)
 
 // A renderer sends this to the browser process when it wants to
 // create a ppapi broker.  The browser will create the broker process