[DevTools] Fix search results hover and click area.

third_party/WebKit/Source/devtools/front_end/sources/sourcesSearch.css

 /*
  * Copyright 2014 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 .search-drawer-header {
     flex: none;
     display: flex;
     border-bottom: 2px solid #e8e8e8;
@@ skipping 87 matching lines @@
     background-image: url(Images/toolbarButtonGlyphs_2x.png);
 }
 } /* media */
 
 .search-view .search-results {
     overflow-y: auto;
     display: flex;
     flex: auto;
 }
 
+.search-view .search-results > div {
+    flex: auto;
+}
+
 .search-results .empty-view {
     pointer-events: none;
 }
 
 .empty-view {
     font-size: 24px;
     color: rgb(75%, 75%, 75%);
     font-weight: bold;
     padding: 10px;
     display: flex;
     align-items: center;
     justify-content: center;
 }