GeometryInterface: Enable GeometryInterfaces by default.

third_party/WebKit/Source/core/core_idl_files.gni

 # Copyright 2016 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.
 
 import("//third_party/WebKit/Source/bindings/bindings.gni")
 import("//third_party/WebKit/Source/core/core.gni")
 
 # The paths in this file are absolute since this file is imported and the
 # file lists must be valid from multple "current directories".
 
@@ skipping 44 matching lines @@
                                  "css/CSSViewportRule.idl",
                                  "css/FontFace.idl",
                                  "css/FontFaceSet.idl",
                                  "css/FontFaceSetLoadEvent.idl",
                                  "css/MediaList.idl",
                                  "css/MediaQueryList.idl",
                                  "css/MediaQueryListEvent.idl",
                                  "css/StyleMedia.idl",
                                  "css/StyleSheet.idl",
                                  "css/StyleSheetList.idl",
-                                 "css/WebKitCSSMatrix.idl",
                                  "css/cssom/CSSImageValue.idl",
                                  "css/cssom/CSSKeywordValue.idl",
                                  "css/cssom/CSSMatrixComponent.idl",
                                  "css/cssom/CSSNumericValue.idl",
                                  "css/cssom/CSSPerspective.idl",
                                  "css/cssom/CSSPositionValue.idl",
                                  "css/cssom/CSSResourceValue.idl",
                                  "css/cssom/CSSRotation.idl",
                                  "css/cssom/CSSScale.idl",
                                  "css/cssom/CSSSkew.idl",
@@ skipping 578 matching lines @@
 core_generated_interface_idl_files = generated_webcore_testing_idl_files  # interfaces
 core_generated_dependency_idl_files =
     core_global_constructors_generated_idl_files  # partial interfaces
 
 # Dependency IDL files: don't generate individual bindings, but do process
 # in IDL dependency computation, and count as build dependencies
 # 'core_dependency_idl_files' is already used in Source/core, so avoid
 # collision
 core_all_dependency_idl_files =
     core_static_dependency_idl_files + core_generated_dependency_idl_files