[DMC #20] Remove DocumentMarker::IsActiveMatch() and SetIsActiveMatch() methods

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

Index: third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
diff --git a/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h b/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
index 539b948377d9e62e672a96b48c6cf2abdd62033e..6433003ff51967f7cfed7719dbec2cf2a5f173b4 100644
--- a/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
+++ b/third_party/WebKit/Source/core/editing/markers/TextMatchMarker.h
@@ -32,6 +32,10 @@
 
 namespace blink {
 
+// A subclass of DocumentMarker used to store information specific to TextMatch
+// markers. We store whether or not the match is active, a LayoutRect used for
+// rendering the marker, and whether or not the LayoutRect is currently
+// up-to-date.
 class TextMatchMarker final : public DocumentMarker {
  private:
   enum class State { kInvalid, kValidNull, kValidNotNull };