Update mojo sdk to rev 3d23dae011859a2aae49f1d1adde705c8e85d819

third_party/mojo/src/mojo/edk/embedder/platform_support.h

Index: third_party/mojo/src/mojo/edk/embedder/platform_support.h
diff --git a/third_party/mojo/src/mojo/edk/embedder/platform_support.h b/third_party/mojo/src/mojo/edk/embedder/platform_support.h
index 4556ee3fa023c2e223b95ef2cd89204cd496119a..80ee81b8afc9278e8fb8d5398d38a3e47f705c4e 100644
--- a/third_party/mojo/src/mojo/edk/embedder/platform_support.h
+++ b/third_party/mojo/src/mojo/edk/embedder/platform_support.h
@@ -18,10 +18,13 @@ class PlatformSharedBuffer;
 
 // This class is provided by the embedder to implement (typically
 // platform-dependent) things needed by the Mojo system implementation.
+// Implementations must be thread-safe.
 class MOJO_SYSTEM_IMPL_EXPORT PlatformSupport {
  public:
   virtual ~PlatformSupport() {}
 
+  virtual void GetCryptoRandomBytes(void* bytes, size_t num_bytes) = 0;
+
   virtual PlatformSharedBuffer* CreateSharedBuffer(size_t num_bytes) = 0;
   virtual PlatformSharedBuffer* CreateSharedBufferFromHandle(
       size_t num_bytes,