Revert "Mark supportsPointConversions deprecated and always true rather than testing DOMPoint"

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index f91d05dafe6f78eb47caf5019f53fdb79735dec5..6b85ade3654a6a68b70fa501e187cdd9bb6ef48d 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -39008,9 +39008,11 @@ class Window extends EventTarget implements WindowEventHandlers, WindowBase, Glo
     return _requestFileSystem(persistent? 1 : 0, size);
   }
 
-  /// Obsolete API for testing if Geometry APIs supported.
-  @Deprecated("Obsolete")
-  static bool get supportsPointConversions => true;
+  /**
+   * convertPointFromNodeToPage and convertPointFromPageToNode are removed.
+   * see http://dev.w3.org/csswg/cssom-view/#geometry
+   */
+  static bool get supportsPointConversions => DomPoint.supported;
   // To suppress missing implicit constructor warnings.
   factory Window._() { throw new UnsupportedError("Not supported"); }