Remove selected text when committing empty text

third_party/WebKit/Source/web/WebLocalFrameImpl.cpp

Index: third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
diff --git a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
index 13d28c86ad5663d0035a2dadd0f28788c9a1dd0a..c7229f48b181ba770151fd98abebeb562f4526c6 100644
--- a/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
+++ b/third_party/WebKit/Source/web/WebLocalFrameImpl.cpp
@@ -1295,10 +1295,6 @@ bool WebLocalFrameImpl::SetCompositionFromExistingText(
 
   InputMethodController& input_method_controller =
       GetFrame()->GetInputMethodController();
-  input_method_controller.CancelComposition();
-
-  if (composition_start == composition_end)
-    return true;
 
   // TODO(xiaochengh): The use of updateStyleAndLayoutIgnorePendingStylesheets
   // needs to be audited.  See http://crbug.com/590369 for more details.