Make DocumentMarker::AllMarkers() automatically track list of types

third_party/WebKit/Source/core/editing/markers/DocumentMarker.h

Index: third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
diff --git a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
index 25e398b382c4a499c4ed06df6caeaabc52f9a669..0171ea10ed9826b8fe17f250839600ae601049c1 100644
--- a/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
+++ b/third_party/WebKit/Source/core/editing/markers/DocumentMarker.h
@@ -122,8 +122,7 @@ class CORE_EXPORT DocumentMarker : public GarbageCollected<DocumentMarker> {
 
   class AllMarkers : public MarkerTypes {
    public:
-    AllMarkers()
-        : MarkerTypes(kSpelling | kGrammar | kTextMatch | kComposition) {}
+    AllMarkers() : MarkerTypes((1 << kMarkerTypeIndexesCount) - 1) {}
   };
 
   class MisspellingMarkers : public MarkerTypes {