[DMC #24] Add SpellingMarker and GrammarMarker (subclasses of DocumentMarker)

third_party/WebKit/Source/core/editing/BUILD.gn

Index: third_party/WebKit/Source/core/editing/BUILD.gn
diff --git a/third_party/WebKit/Source/core/editing/BUILD.gn b/third_party/WebKit/Source/core/editing/BUILD.gn
index 6dfdba75194d397bce728b28ce617d964b977a98..f6cb03318833730adbff92473f0fe34a6b666b54 100644
--- a/third_party/WebKit/Source/core/editing/BUILD.gn
+++ b/third_party/WebKit/Source/core/editing/BUILD.gn
@@ -204,10 +204,16 @@ blink_core_sources("editing") {
     "markers/DocumentMarkerList.h",
     "markers/DocumentMarkerListEditor.cpp",
     "markers/DocumentMarkerListEditor.h",
+    "markers/GrammarMarker.cpp",
+    "markers/GrammarMarker.h",
     "markers/GrammarMarkerListImpl.cpp",
     "markers/GrammarMarkerListImpl.h",
+    "markers/SpellCheckMarker.cpp",
+    "markers/SpellCheckMarker.h",
     "markers/SpellCheckMarkerListImpl.cpp",
     "markers/SpellCheckMarkerListImpl.h",
+    "markers/SpellingMarker.cpp",
+    "markers/SpellingMarker.h",
     "markers/SpellingMarkerListImpl.cpp",
     "markers/SpellingMarkerListImpl.h",
     "markers/TextMatchMarker.h",
@@ -319,7 +325,9 @@ source_set("unit_tests") {
     "markers/DocumentMarkerListEditorTest.cpp",
     "markers/DocumentMarkerTest.cpp",
     "markers/GrammarMarkerListImplTest.cpp",
+    "markers/GrammarMarkerTest.cpp",
     "markers/SpellingMarkerListImplTest.cpp",
+    "markers/SpellingMarkerTest.cpp",
     "markers/TextMatchMarkerListImplTest.cpp",
     "serializers/StyledMarkupSerializerTest.cpp",
     "spellcheck/IdleSpellCheckCallbackTest.cpp",