[mojo-edk] Sanity checks on ports message parsing

mojo/edk/system/ports/message.h

Index: mojo/edk/system/ports/message.h
diff --git a/mojo/edk/system/ports/message.h b/mojo/edk/system/ports/message.h
index df3b8f2ddbf962e96ff91a890eac4b7993fef1b7..926ce752a844669aa2430a5875e37417fac11690 100644
--- a/mojo/edk/system/ports/message.h
+++ b/mojo/edk/system/ports/message.h
@@ -26,8 +26,9 @@ class Message {
  public:
   virtual ~Message() {}
 
-  // Inspect the message at |bytes| and return the size of each section.
-  static void Parse(const void* bytes,
+  // Inspect the message at |bytes| and return the size of each section. Returns
+  // |false| if the message is malformed and |true| otherwise.
+  static bool Parse(const void* bytes,
                     size_t num_bytes,
                     size_t* num_header_bytes,
                     size_t* num_payload_bytes,