Selection API of INPUT/TEXTAREA should not update FrameSelection without focusing.

third_party/WebKit/LayoutTests/fast/forms/text/input-delete.html

Index: third_party/WebKit/LayoutTests/fast/forms/text/input-delete.html
diff --git a/third_party/WebKit/LayoutTests/fast/forms/text/input-delete.html b/third_party/WebKit/LayoutTests/fast/forms/text/input-delete.html
index 63724fec08462429de7dc6d995a9dd58ba78a92f..88ef3a2a7785fda09e19cfc551bb019e958cbd58 100644
--- a/third_party/WebKit/LayoutTests/fast/forms/text/input-delete.html
+++ b/third_party/WebKit/LayoutTests/fast/forms/text/input-delete.html
@@ -7,6 +7,7 @@ function test() {
         testRunner.dumpAsText();
     }
     document.getElementById('tf').setSelectionRange(5, 11);
+    document.getElementById('tf').focus();
     deleteCommand();
     if (document.getElementById('tf').value == "Test Failed") {
         document.getElementById('res').innerHTML = "Failed";