Add an IPC channel between the NaCl loader process and the renderer.

ppapi/native_client/src/trusted/plugin/plugin.cc

Index: ppapi/native_client/src/trusted/plugin/plugin.cc
===================================================================
--- ppapi/native_client/src/trusted/plugin/plugin.cc	(revision 134969)
+++ ppapi/native_client/src/trusted/plugin/plugin.cc	(working copy)
@@ -34,6 +34,7 @@
 #include "native_client/src/trusted/desc/nacl_desc_wrapper.h"
 #include "native_client/src/trusted/nonnacl_util/sel_ldr_launcher.h"
 #include "native_client/src/trusted/plugin/json_manifest.h"
+#include "native_client/src/trusted/plugin/nacl_entry_points.h"
 #include "native_client/src/trusted/plugin/nacl_subprocess.h"
 #include "native_client/src/trusted/plugin/nexe_arch.h"
 #include "native_client/src/trusted/plugin/plugin_error.h"
@@ -1214,6 +1215,11 @@
                    error_info->message().c_str()));
     return false;
   }
+
+  if (start_ppapi_proxy && start_ppapi_proxy(pp_instance())) {

[dmichael (off chromium), 2012/05/04 22:51:42]

We want start_ppapi_proxy to not be called by default, right? (Maybe just make
it NULL in the browser side, enabled with conditional compilation or something
for now). We have to make sure to get that bit right before check in, at least,
though I'm guessing you're just exploring how to make it work before worrying
about making sure it's off.

[bbudge, 2012/05/07 18:08:53]

That's correct, we need a switch before this can land.
On 2012/05/04 22:51:42, dmichael wrote:

+    return true;
+  }
+
   nacl::scoped_ptr<BrowserPpp> ppapi_proxy(new BrowserPpp(srpc_channel, this));
   PLUGIN_PRINTF(("Plugin::StartProxiedExecution (ppapi_proxy=%p)\n",
                  static_cast<void*>(ppapi_proxy.get())));