[wasm] [trap handler] do not leak memory on failure path

There were two failure paths where the CodeProtectionInfo object would not be
freed. This adds a free() on those paths to prevent a memory leak.

Bug: v8:7434
Change-Id: I48d60aee3255d829bf39b51cc30fabaf76b1fb07
Reviewed-on: https://chromium-review.googlesource.com/927746Reviewed-by: Brad Nelson <bradnelson@chromium.org>
Commit-Queue: Eric Holk <eholk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51408}

src/trap-handler/handler-outside.cc

@@ -181,6 +181,7 @@ int RegisterHandlerData(
       new_size = int_max;
     }
     if (new_size == gNumCodeObjects) {
+      free(data);
       return kInvalidIndex;
     }
 
@@ -215,6 +216,7 @@ int RegisterHandlerData(
 
     return static_cast<int>(i);
   } else {
+    free(data);
     return kInvalidIndex;
   }
 }