[profiler] Add missing VMStates to EntryForVMState

Bug: chromium:770530
Change-Id: I48f4c6968a34e0dce99f72e56302de81bf0f1991
Reviewed-on: https://chromium-review.googlesource.com/709597
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48446}

src/profiler/profile-generator.cc

@@ -739,7 +739,9 @@ CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
     case GC:
       return CodeEntry::gc_entry();
     case JS:
+    case PARSER:
     case COMPILER:
+    case BYTECODE_COMPILER:
     // DOM events handlers are reported as OTHER / EXTERNAL entries.
     // To avoid confusing people, let's put all these entries into
     // one bucket.
@@ -748,8 +750,8 @@ CodeEntry* ProfileGenerator::EntryForVMState(StateTag tag) {
       return CodeEntry::program_entry();
     case IDLE:
       return CodeEntry::idle_entry();
-    default: return NULL;
   }
+  UNREACHABLE();
 }
 
 }  // namespace internal