Pass around IPC::ChannelHandles instead of raw fds in the NaCl IRT.

ppapi/nacl_irt/plugin_startup.h

Index: ppapi/nacl_irt/plugin_startup.h
diff --git a/ppapi/nacl_irt/plugin_startup.h b/ppapi/nacl_irt/plugin_startup.h
index 2684a78316bc821e670bb6d2f9d926b17b1efb1f..6885c2f801be635d5d22f0978ddd2eb244fccc9d 100644
--- a/ppapi/nacl_irt/plugin_startup.h
+++ b/ppapi/nacl_irt/plugin_startup.h
@@ -5,6 +5,7 @@
 #ifndef PPAPI_NACL_IRT_PLUGIN_STARTUP_H_
 #define PPAPI_NACL_IRT_PLUGIN_STARTUP_H_
 
+#include "ipc/ipc_channel_handle.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 
 namespace base {
@@ -19,19 +20,21 @@ class ManifestService;
 // Sets the IPC channels for the browser and the renderer by the given FD

[Mark Seaborn, 2016/07/13 19:23:10]

Update "FD numbers" in comment?

[Anand Mistry (off Chromium), 2016/07/13 23:49:42]

Done.

 // numbers. This will be used for non-SFI mode. Must be called before the
 // ppapi_start() IRT interface is called.
-PPAPI_PROXY_EXPORT void SetIPCFileDescriptors(
-    int browser_ipc_fd, int renderer_ipc_fd, int manifest_service_fd);
+PPAPI_PROXY_EXPORT void SetIPCChannelHandles(
+    IPC::ChannelHandle browser_ipc_fd,

[Mark Seaborn, 2016/07/13 19:23:10]

"fd" -> "handle"

[Anand Mistry (off Chromium), 2016/07/13 23:49:42]

Done.

+    IPC::ChannelHandle renderer_ipc_fd,
+    IPC::ChannelHandle manifest_service_fd);
 
 // Runs start up procedure for the plugin.
 // Specifically, start background IO thread for IPC, and prepare
 // shutdown event instance.
 PPAPI_PROXY_EXPORT void StartUpPlugin();
 
-// Returns IPC file descriptor for PPAPI to the browser.
-int GetBrowserIPCFileDescriptor();
+// Returns IPC channel handle for PPAPI to the browser.
+IPC::ChannelHandle GetBrowserIPCChannelHandle();
 
-// Returns IPC file descriptor for PPAPI to the renderer.
-int GetRendererIPCFileDescriptor();
+// Returns IPC channel handle for PPAPI to the renderer.
+IPC::ChannelHandle GetRendererIPCChannelHandle();
 
 // Returns the shutdown event instance for the plugin.
 // Must be called after StartUpPlugin().