[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 60bdd70f21d27255861e51b0c2d2fd6e799fc32d..95fa04676ce0e670025a74036e6f24fed4683ad1 100644
--- a/mojo/edk/system/ports/message.h
+++ b/mojo/edk/system/ports/message.h
@@ -27,8 +27,9 @@ 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,