Fix the crash that could occur when the window is closed while web contents drag is in progress.

content/test/test_web_contents_view.cc

Index: content/test/test_web_contents_view.cc
diff --git a/content/test/test_web_contents_view.cc b/content/test/test_web_contents_view.cc
index 126a6bfc0d45d122ced1e746a7c87433a9320a07..1fc17c8c37de11f1aa56586af8f867fe155bee95 100644
--- a/content/test/test_web_contents_view.cc
+++ b/content/test/test_web_contents_view.cc
@@ -90,13 +90,6 @@ void TestWebContentsView::StoreFocus() {
 void TestWebContentsView::RestoreFocus() {
 }
 
-bool TestWebContentsView::IsDoingDrag() const {
-  return false;
-}
-
-void TestWebContentsView::CancelDragAndCloseTab() {
-}
-
 WebDropData* TestWebContentsView::GetDropData() const {
   return NULL;
 }