Use macros to define pepper interfaces

ppapi/proxy/ppb_crypto_proxy.cc

Index: ppapi/proxy/ppb_crypto_proxy.cc
diff --git a/ppapi/proxy/ppb_crypto_proxy.cc b/ppapi/proxy/ppb_crypto_proxy.cc
index c534864f4a539bb219537cea80d270ba2bb43e0b..e80e17a047b1c571870cacaf3fdadf508596e1f5 100644
--- a/ppapi/proxy/ppb_crypto_proxy.cc
+++ b/ppapi/proxy/ppb_crypto_proxy.cc
@@ -17,16 +17,14 @@ const PPB_Crypto_Dev crypto_interface = {
   &ppapi::CryptoImpl::GetRandomBytes
 };
 
-InterfaceProxy* CreateCryptoProxy(Dispatcher* dispatcher,
-                                  const void* target_interface) {
-  return new PPB_Crypto_Proxy(dispatcher, target_interface);
+InterfaceProxy* CreateCryptoProxy(Dispatcher* dispatcher) {
+  return new PPB_Crypto_Proxy(dispatcher);
 }
 
 }  // namespace
 
-PPB_Crypto_Proxy::PPB_Crypto_Proxy(Dispatcher* dispatcher,
-                                   const void* target_interface)
-    : InterfaceProxy(dispatcher, target_interface) {
+PPB_Crypto_Proxy::PPB_Crypto_Proxy(Dispatcher* dispatcher)
+    : InterfaceProxy(dispatcher) {
   NOTREACHED();  // See comment in the header file.
 }