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..06ce229de4571e19199f0f0d03ac28f0657bfc48 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 {
@@ -16,22 +17,24 @@ namespace ppapi {
 
 class ManifestService;
 
-// Sets the IPC channels for the browser and the renderer by the given FD
-// numbers. This will be used for non-SFI mode. Must be called before the
+// Sets the IPC channels for the browser and the renderer.
+// 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_handle,
+    IPC::ChannelHandle renderer_ipc_handle,
+    IPC::ChannelHandle manifest_service_handle);
 
 // 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().
@@ -40,8 +43,8 @@ base::WaitableEvent* GetShutdownEvent();
 // Returns the IOThread for the plugin. Must be called after StartUpPlugin().
 base::Thread* GetIOThread();
 
-// Returns the ManifestService interface. To use this, manifest_service_fd
-// needs to be set via SetIPCFileDescriptors. Must be called after
+// Returns the ManifestService interface. To use this, manifest_service_handle
+// needs to be set via SetIPCChannelHandles. Must be called after
 // StartUpPlugin().
 // If not available, returns NULL.
 ManifestService* GetManifestService();