Selection API: add removeRange().

third_party/WebKit/Source/core/editing/DOMSelection.cpp

Index: third_party/WebKit/Source/core/editing/DOMSelection.cpp
diff --git a/third_party/WebKit/Source/core/editing/DOMSelection.cpp b/third_party/WebKit/Source/core/editing/DOMSelection.cpp
index d8358226054235f26e43529575d7152bdeef70ef..b19285ebdf988df34cb5022b386dccb7f546b0a4 100644
--- a/third_party/WebKit/Source/core/editing/DOMSelection.cpp
+++ b/third_party/WebKit/Source/core/editing/DOMSelection.cpp
@@ -588,6 +588,14 @@ void DOMSelection::clearCachedRangeIfSelectionOfDocument() {
   frame()->selection().clearDocumentCachedRange();
 }
 
+void DOMSelection::removeRange(Range* range) {
+  DCHECK(range);
+  if (!isAvailable())
+    return;
+  if (range == primaryRangeOrNull())
+    frame()->selection().clear();
+}
+
 void DOMSelection::removeAllRanges() {
   if (!isAvailable())
     return;