Enable ChannelMojo for non-renderer child processes

content/public/common/child_process_host.h

Index: content/public/common/child_process_host.h
diff --git a/content/public/common/child_process_host.h b/content/public/common/child_process_host.h
index c79938b405f82d6c0d591730d0cf59c31c766aac..74db503aacf5a99fa73dec45b80e4f1449ed43b2 100644
--- a/content/public/common/child_process_host.h
+++ b/content/public/common/child_process_host.h
@@ -6,6 +6,7 @@
 #define CONTENT_PUBLIC_COMMON_CHILD_PROCESS_HOST_H_
 
 #include "base/files/scoped_file.h"
+#include "base/process/process_handle.h"
 #include "build/build_config.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_channel_proxy.h"
@@ -97,6 +98,9 @@ class CONTENT_EXPORT ChildProcessHost : public IPC::Sender {
   // Adds an IPC message filter.  A reference will be kept to the filter.
   virtual void AddFilter(IPC::MessageFilter* filter) = 0;
 
+  // Notifies the child process being launched
+  virtual void OnProcessLaunched(base::ProcessHandle process) = 0;
+
 #if defined(OS_POSIX)
   // See IPC::Channel::TakeClientFileDescriptor.
   virtual base::ScopedFD TakeClientFileDescriptor() = 0;