[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 c56e683f913477442acc7f7bde9a470fe2845b0e..4c5dd833e5d3f8ca6a50395bc484ff00caeb39bb 100644
--- a/third_party/WebKit/Source/core/editing/BUILD.gn
+++ b/third_party/WebKit/Source/core/editing/BUILD.gn
@@ -203,10 +203,16 @@ 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",
@@ -312,7 +318,9 @@ source_set("unit_tests") {
     "markers/DocumentMarkerControllerTest.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",