Add an accessibility audit test for WebUI pages

.gitmodules

 [submodule "breakpad/src"]
         path = breakpad/src
         url = https://chromium.googlesource.com/external/google-breakpad/src.git
         os = all
 [submodule "build/util/support"]
         path = build/util/support
         url = 
         os = ios
 [submodule "chrome/installer/mac/third_party/xz/xz"]
         path = chrome/installer/mac/third_party/xz/xz
@@ skipping 168 matching lines @@
         url = https://chromium.googlesource.com/chromiumos/platform/system_api.git
         os = unix
 [submodule "third_party/cygwin"]
         path = third_party/cygwin
         url = https://chromium.googlesource.com/chromium/deps/cygwin.git
         os = win
 [submodule "third_party/ffmpeg"]
         path = third_party/ffmpeg
         url = https://chromium.googlesource.com/chromium/third_party/ffmpeg.git
         os = all
+[submodule "third_party/findbugs"]
+        path = third_party/findbugs
+        url = https://chromium.googlesource.com/chromium/deps/findbugs.git
+        os = android
 [submodule "third_party/flac"]
         path = third_party/flac
         url = https://chromium.googlesource.com/chromium/deps/flac.git
         os = all
 [submodule "third_party/freetype"]
         path = third_party/freetype
         url = https://chromium.googlesource.com/chromium/src/third_party/freetype.git
         os = android
 [submodule "third_party/gnu_binutils"]
         path = third_party/gnu_binutils
@@ skipping 76 matching lines @@
         url = https://chromium.googlesource.com/chromium/deps/lighttpd.git
         os = win,mac
 [submodule "third_party/lss"]
         path = third_party/lss
         url = https://chromium.googlesource.com/external/linux-syscall-support/lss.git
         os = unix
 [submodule "third_party/mingw-w64/mingw/bin"]
         path = third_party/mingw-w64/mingw/bin
         url = https://chromium.googlesource.com/native_client/deps/third_party/mingw-w64/mingw/bin.git
         os = win
-[submodule "third_party/mozc/chrome/chromeos/renderer"]
-        path = third_party/mozc/chrome/chromeos/renderer
-        url = https://chromium.googlesource.com/external/mozc/src/chrome/chromeos/renderer.git
-        os = all
-[submodule "third_party/mozc/session"]
-        path = third_party/mozc/session
-        url = https://chromium.googlesource.com/external/mozc/src/session.git
-        os = all
 [submodule "third_party/mtpd/source"]
         path = third_party/mtpd/source
         url = https://chromium.googlesource.com/chromiumos/platform/mtpd.git
         os = unix
 [submodule "third_party/nacl_sdk_binaries"]
         path = third_party/nacl_sdk_binaries
         url = https://chromium.googlesource.com/chromium/deps/nacl_sdk_binaries.git
         os = win
 [submodule "third_party/nss"]
         path = third_party/nss
@@ skipping 122 matching lines @@
 [submodule "third_party/webgl_conformance"]
         path = third_party/webgl_conformance
         url = https://chromium.googlesource.com/chromium/deps/webgl/sdk/tests.git
         os = all
 [submodule "third_party/webpagereplay"]
         path = third_party/webpagereplay
         url = https://chromium.googlesource.com/external/web-page-replay.git
         os = all
 [submodule "third_party/webrtc"]
         path = third_party/webrtc
-        url = https://chromium.googlesource.com/external/webrtc/stable/src.git
+        url = https://chromium.googlesource.com/external/webrtc/stable/webrtc.git
         os = all
 [submodule "third_party/xdg-utils"]
         path = third_party/xdg-utils
         url = https://chromium.googlesource.com/chromium/deps/xdg-utils.git
         os = unix
 [submodule "third_party/xulrunner-sdk"]
         path = third_party/xulrunner-sdk
         url = https://chromium.googlesource.com/chromium/deps/xulrunner-sdk.git
         os = win
 [submodule "third_party/yasm/binaries"]
@@ skipping 21 matching lines @@
         url = https://chromium.googlesource.com/chromium/deps/acid3.git
         os = all
 [submodule "tools/swarm_client"]
         path = tools/swarm_client
         url = https://chromium.googlesource.com/chromium/tools/swarm_client.git
         os = all
 [submodule "v8"]
         path = v8
         url = https://chromium.googlesource.com/external/v8.git
         os = all