[DevTools] Add "Show all" check box in Service Worker view.

third_party/WebKit/Source/devtools/front_end/resources/serviceWorkersView.css

Index: third_party/WebKit/Source/devtools/front_end/resources/serviceWorkersView.css
diff --git a/third_party/WebKit/Source/devtools/front_end/resources/serviceWorkersView.css b/third_party/WebKit/Source/devtools/front_end/resources/serviceWorkersView.css
index 126b77d7deadd32d609c623af2dd20ac2107b1e8..86646e7dda695ce244f0b45d8ec27c11cfd67873 100644
--- a/third_party/WebKit/Source/devtools/front_end/resources/serviceWorkersView.css
+++ b/third_party/WebKit/Source/devtools/front_end/resources/serviceWorkersView.css
@@ -4,6 +4,10 @@
  * found in the LICENSE file.
  */
 
+.service-workers-view {
+  overflow-y: scroll;
+}
+
 .service-workers-view > .toolbar {
     border-bottom: 1px solid #dadada;
 }
@@ -12,7 +16,6 @@
    -webkit-user-select: text;
     margin: 0;
     padding: 5px;
-    display: flex;
 }
 
 .service-workers-root ol {