Updated zoom constants and pages to resolve issue #6943

browser/resources/extensions/extensions_resources.grd

@@ -12,6 +12,8 @@
     <structures>
       <structure name="IDR_EXTENSIONS_BRAVE_ITEM_LIST_MORE_ITEMS_JS" file="brave_item_list_more_items.js" type="chrome_html" preprocess="true" />
       <structure name="IDR_EXTENSIONS_BRAVE_ITEM_LIST_MORE_ITEMS_HTML" file="brave_item_list_more_items.html" type="chrome_html" preprocess="true" allowexternalscript="true" />
+      <!-- included in chromium_src/chrome/browser/ui/webui/print_preview/print_preview_ui.cc -->
+      <structure name="IDR_BRAVE_PDF_VIEWPORT_JS" file="js_override/pdf/viewport.js" preprocess="true" type="chrome_html" />
     </structures>
     <includes>
       <include name="IDR_EXTENSIONS_BRAVE_STAMP" file="brave_unpack.stamp" type="BINDATA" />

browser/resources/extensions/js_override/pdf/viewport.js

@@ -0,0 +1,11 @@
+/* Copyright (c) 2019 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+<include src="../../../../../../chrome/browser/resources/pdf/viewport.js">
+
+Viewport.ZOOM_FACTORS = [
+  0.25, 1 / 3, 0.5, 2 / 3, 0.75, 0.8, 0.9, 1, 1.1, 1.25, 1.33, 1.4, 1.5, 1.75, 2, 2.5, 3,
+  4, 5
+];

browser/resources/settings/brave_settings_overrides.js

@@ -103,8 +103,37 @@ const BraveClearSettingsMenuHighlightBehavior = {
   }
 }
 
+const BraveAddZoomLevelsBehavior = {
+  ready: function() {
+    this._setPageZoomLevels_([
+        1 / 4,
+        1 / 3,
+        1 / 2,
+        2 / 3,
+        3 / 4,
+        4 / 5,
+        9 / 10,
+        1,
+        11 / 10,
+        5 / 4,
+        4 / 3,
+        7 / 5,
+        3 / 2,
+        7 / 4,
+        2,
+        5 / 2,
+        3,
+        4,
+        5,
+      ])
+  }
+}
+
 // Polymer Component Behavior injection (like superclasses)
 BravePatching.RegisterPolymerComponentBehaviors({
+  'settings-appearance-page': [
+    BraveAddZoomLevelsBehavior
+  ],
   'settings-clear-browsing-data-dialog': [
     BraveClearBrowsingDataOnExitBehavior
   ],

chromium_src/chrome/browser/ui/webui/print_preview/print_preview_ui.cc

@@ -0,0 +1,12 @@
+/* Copyright (c) 2019 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "chrome/grit/component_extension_resources.h"
+#include "brave/browser/resources/extensions/grit/brave_extensions_resources.h"
+
+#undef IDR_PDF_VIEWPORT_JS
+#define IDR_PDF_VIEWPORT_JS  IDR_BRAVE_PDF_VIEWPORT_JS
+#include "../../../../../../../chrome/browser/ui/webui/print_preview/print_preview_ui.cc"  // NOLINT
+#undef IDR_PDF_VIEWPORT_JS

chromium_src/components/zoom/page_zoom_constants.cc

@@ -0,0 +1,22 @@
+/* Copyright (c) 2019 The Brave Authors. All rights reserved.
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "components/zoom/page_zoom_constants.h"
+
+#include "base/stl_util.h"
+
+namespace zoom {
+
+// This list is duplicated in chrome/browser/resources/pdf/viewport.js and in
+// chrome/browser/resources/settings/appearance_page/appearance_page.js. Please
+// make sure the three match.
+const double kPresetZoomFactors[] = {0.25, 1 / 3.0, 0.5, 2 / 3.0, 0.75, 0.8,
+                                     0.9, 1.0, 1.1, 1.25, 4 / 3.0, 7 / 5.0,
+                                     1.5, 1.75, 2.0, 2.5,
+                                     3.0, 4.0, 5.0};
+const std::size_t kPresetZoomFactorsSize = base::size(kPresetZoomFactors);
+
+}  // namespace zoom
+