Revert "Revert 2 CLs to get one last Dartium 34."

tools/dom/idl/dart/dart.idl

Index: tools/dom/idl/dart/dart.idl
diff --git a/tools/dom/idl/dart/dart.idl b/tools/dom/idl/dart/dart.idl
index 7aa1b29e59d0b59f65008f96bf90b71950ef295f..6ef26f694da024e4f920bafd5d0581e51990dca4 100644
--- a/tools/dom/idl/dart/dart.idl
+++ b/tools/dom/idl/dart/dart.idl
@@ -35,6 +35,8 @@ interface Document {
 [Supplemental]
 interface Node {
   [Custom] Node cloneNode([Default=Undefined] optional boolean deep);
+  [Suppressed] readonly attribute Element nextElementSibling;
+  [Suppressed] readonly attribute Element previousElementSibling;
 };
 
 [Supplemental]
@@ -57,6 +59,18 @@ interface ElementTraversal : ChildNode, ParentNode {
 Element implements ElementTraversal;
 */
 
+[Supplemental]
+interface Element {
+  readonly attribute Element nextElementSibling;
+  readonly attribute Element previousElementSibling;
+};
+
+[Supplemental]
+interface CharacterData {
+  readonly attribute Element nextElementSibling;
+  readonly attribute Element previousElementSibling;
+};
+
 [Callback]
 interface TimeoutHandler {
   void handleEvent();
@@ -75,6 +89,11 @@ interface URL {
 interface CanvasRenderingContext2D {
   [DartName=createImageDataFromImageData] ImageData createImageData(ImageData imagedata);
 
+  // Removed in 1916.
+  [Suppressed] void drawSystemFocusRing(Element element);
+
+  [Suppressed] void assert(boolean condition);
+
   [Suppressed] attribute boolean webkitImageSmoothingEnabled;
 };
 
@@ -350,4 +369,10 @@ interface Window : EventTarget {};
 [Suppressed]
 interface Promise {};
 
+[Supplemental]
+interface Screen {
+    [Suppressed]
+    boolean lockOrientation(sequence<DOMString> orientations);
+};
+
 Element implements GlobalEventHandlers;