[mojo-edk] Make the Mojo EDK compile under NaCl.

mojo/edk/embedder/embedder.cc

Index: mojo/edk/embedder/embedder.cc
diff --git a/mojo/edk/embedder/embedder.cc b/mojo/edk/embedder/embedder.cc
index 5d7e3455e11ed76862f4448947056a18c37c475d..235a7a4a78d5110e9f9907000fb91ba343023199 100644
--- a/mojo/edk/embedder/embedder.cc
+++ b/mojo/edk/embedder/embedder.cc
@@ -10,15 +10,19 @@
 #include "base/location.h"
 #include "base/logging.h"
 #include "base/memory/ref_counted.h"
+#include "base/rand_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/task_runner.h"
 #include "base/threading/thread_task_runner_handle.h"
-#include "crypto/random.h"
 #include "mojo/edk/embedder/embedder_internal.h"
 #include "mojo/edk/embedder/platform_channel_pair.h"
 #include "mojo/edk/embedder/process_delegate.h"
 #include "mojo/edk/system/core.h"
 
+#if !defined(OS_NACL)
+#include "crypto/random.h"
+#endif
+
 namespace mojo {
 namespace edk {
 
@@ -138,7 +142,12 @@ ScopedMessagePipeHandle CreateChildMessagePipe(const std::string& token) {
 
 std::string GenerateRandomToken() {
   char random_bytes[16];
+#if defined(OS_NACL)
+  // Not secure. For NaCl only!
+  base::RandBytes(random_bytes, 16);
+#else
   crypto::RandBytes(random_bytes, 16);
+#endif
   return base::HexEncode(random_bytes, 16);
 }