Update the task manager with the debug stub port chosen by nacl.

components/nacl/browser/nacl_process_host.h

Index: components/nacl/browser/nacl_process_host.h
diff --git a/components/nacl/browser/nacl_process_host.h b/components/nacl/browser/nacl_process_host.h
index 758f7080a4afe56d71eccc2c9c45dd99d28d6b49..2c20dad4a30699d19e6153c53be7b9153fd049b7 100644
--- a/components/nacl/browser/nacl_process_host.h
+++ b/components/nacl/browser/nacl_process_host.h
@@ -133,6 +133,10 @@ class NaClProcessHost : public content::BrowserChildProcessHostDelegate {
   void SendMessageToRenderer(const NaClLaunchResult& result,
                              const std::string& error_message);
 
+  // Mark the process as using a particular debug stub port and notify

[Mark Seaborn, 2014/03/26 23:34:04]

Nit: if you say "GDB debug stub" in the comments it provides a little more
context to unfamiliar readers.

[bradn, 2014/05/05 18:46:07]

Done.

+  // listeners.
+  void ChangeDebugStubPort(int port);

[Mark Seaborn, 2014/03/26 23:34:04]

uint16_t for consistency with other cases?  Maybe s/Change/Set/?

[bradn, 2014/05/05 18:46:07]

Done.

+
   // Sends the message to the NaCl process to load the plugin. Returns true
   // on success.
   bool StartNaClExecution();
@@ -160,6 +164,9 @@ class NaClProcessHost : public content::BrowserChildProcessHostDelegate {
                                    IPC::Message* reply_msg);
 #endif
 
+  // Called when the debug stub port has be selected.

[Mark Seaborn, 2014/03/26 23:34:04]

"has been"

[bradn, 2014/05/05 18:46:07]

Done.

+  void OnDebugStubPortSelected(uint16_t debug_stub_port);

[Mark Seaborn, 2014/03/26 23:34:04]

Nit: Can you keep the decl ordering the same as in the .cc file?  Same for
ChangeDebugStubPort().

[bradn, 2014/05/05 18:46:07]

Done.

+
   // Called when the PPAPI IPC channels to the browser/renderer have been
   // created.
   void OnPpapiChannelsCreated(