[MD Extensions] Move search field out of downloads, use it in extensions

chrome/browser/resources/md_downloads/toolbar.css

 /* Copyright 2015 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. */
 
 :host {
   align-items: center;
   background: rgb(63, 85, 102);
   color: white;
   content-sizing: padding-box;
   display: flex;
@@ skipping 21 matching lines @@
 }
 
 :host(:not([downloads-showing])) #actions {
   justify-content: center;
 }
 
 #actions paper-button {
   -webkit-margin-end: 8px;
 }
 
-#actions,
-#search-term {
+#actions {
   color: rgb(192, 199, 205);
 }
 
 #search {
   -webkit-padding-end: 10px;
   box-sizing: border-box;
   display: flex;
   justify-content: flex-end;
 }
 
-#search paper-input-container {
-  margin-top: 2px;
-  max-width: 200px;
-  padding: 2px 0;
-  width: 100%;
-}
-
-#search-term {
-  --paper-input-container-color: rgb(192, 199, 205);
-  --paper-input-container-focus-color: rgb(192, 199, 205);
-  --paper-input-container-input: {
-    color: inherit;
-    font-family: inherit;
-    font-size: inherit;
-  };
-  --paper-input-container-input-color: rgb(192, 199, 205);
-  z-index: 0;
-}
-
-#search-term input[type='search']::-webkit-search-decoration,
-#search-term input[type='search']::-webkit-search-cancel-button,
-#search-term input[type='search']::-webkit-search-results-button {
-  -webkit-appearance: none;
-}
-
 paper-icon-button {
   --iron-icon-height: 20px;
   --iron-icon-width: 20px;
   --paper-icon-button: {
     height: 20px;
     padding: 6px;
     width: 20px;
   };
 }
 
-#search-term paper-icon-button {
-  --iron-icon-height: 16px;
-  --iron-icon-width: 16px;
-  --paper-icon-button: {
-    -webkit-margin-end: -8px;
-    height: 16px;
-    padding: 8px;
-    width: 16px;
-  };
-  position: absolute;
-  right: 0;
-  top: -4px;
-  z-index: 1;
-}
-
-:host-context([dir='rtl']) #search-term paper-icon-button {
-  left: 0;
-  right: auto;
-}
-
 #more {
   --paper-menu-button: {
     padding: 0;
   };
   -webkit-margin-start: 16px;
 }
 
 paper-item {
   -webkit-user-select: none;
   cursor: pointer;
@@ skipping 10 matching lines @@
     display: none;
   }
 }
 
 @media all and (max-width: 1024px) {
   /* Hide #actions for narrow windows; they're shown in a vertical dot menu. */
   #actions {
     display: none;
   }
 }