PDF: Remove 'material' from file and variable names

chrome/browser/resources/pdf/index-material.css

Index: chrome/browser/resources/pdf/index-material.css
diff --git a/chrome/browser/resources/pdf/index-material.css b/chrome/browser/resources/pdf/index-material.css
deleted file mode 100644
index a443bac50ec688cf857b1bd5e19251dc83b72efc..0000000000000000000000000000000000000000
--- a/chrome/browser/resources/pdf/index-material.css
+++ /dev/null
@@ -1,50 +0,0 @@
-/* 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. */
-
-body {
-  background-color: rgb(82, 86, 89);
-  font-family: 'Roboto', 'Noto', sans-serif;
-  margin: 0;
-}
-
-viewer-page-indicator {
-  visibility: hidden;
-  z-index: 2;
-}
-
-viewer-pdf-toolbar {
-  position: fixed;
-  width: 100%;
-  z-index: 4;
-}
-
-#plugin {
-  height: 100%;
-  position: fixed;
-  width: 100%;
-  z-index: 1;
-}
-
-#sizer {
-  position: absolute;
-  z-index: 0;
-}
-
-@media(max-height: 250px) {
-  viewer-pdf-toolbar {
-    display: none;
-  }
-}
-
-@media(max-height: 200px) {
-  viewer-zoom-toolbar {
-    display: none;
-  }
-}
-
-@media(max-width: 300px) {
-  viewer-zoom-toolbar {
-    display: none;
-  }
-}