[WebViewLayoutTests] update/document not-webview-exposed interfaces

android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt

Index: android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt
diff --git a/android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt b/android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt
index 9c59a8db068564a832e8eefdf45b9639d76a2c51..73c8f33a03ae1ba84c451da4f9cd2cd71d87a112 100644
--- a/android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt
+++ b/android_webview/tools/system_webview_shell/test/data/webexposed/not-webview-exposed.txt
@@ -1,5 +1,5 @@
-# speech not enabled crbug.com/487255
-interface SpeechSynthesisEvent : Event # speech not enabled
+# speech api not enabled in webview, crbug.com/487255
+interface SpeechSynthesisEvent : Event
 interface SpeechSynthesisUtterance : EventTarget
 interface webkitSpeechGrammar
 interface webkitSpeechGrammarList
@@ -7,17 +7,17 @@ interface webkitSpeechRecognition : EventTarget
 interface webkitSpeechRecognitionError : Event
 interface webkitSpeechRecognitionEvent : Event
 
-# permissions api not enabled in webview crbug.com/490120
+# permissions api not enabled in webview, crbug.com/490120
 interface PermissionStatus : EventTarget
 interface Permissions
 
-# notifications api not enabled in webview crbug.com/434712
+# notifications api not enabled in webview, crbug.com/434712
 interface Notification : EventTarget
 
-# not yet supported in webview.
+# not yet supported in webview and chrome on android in general, crbug.com/154571
 interface SharedWorker : EventTarget
 
-# push API not supported in webview
+# push API not supported in webview, crbug.com/421921
 interface PushManager
 interface PushSubscription
 interface PushSubscriptionOptions
@@ -33,18 +33,21 @@ interface PresentationRequest : EventTarget
 # remoteplayback api not supported in webview crbug.com/521319
 interface RemotePlayback : EventTarget
 
-# crbug.com/589500
+# Android does not support switching the audio output device, crbug.com/589500
+# Remote Playback API is not supported on Android WebView, crbug.com/521319
 interface HTMLMediaElement : HTMLElement
-    getter sinkId
-    method setSinkId
+    getter sinkId                      # crbug.com/589500
+    method setSinkId                   # crbug.com/589500
     setter disableRemotePlayback       # crbug.com/521319
     getter disableRemotePlayback       # crbug.com/521319
     getter remote                      # crbug.com/521319
 
+# permissions API (crbug.com/490120), presentation API (crbug.com/521319) and
+# custom scheme handlers (crbug.com/589502) not supported in webview 
 interface Navigator
     getter permissions                 # crbug.com/490120
-    method registerProtocolHandler     # crbug.com/589502
     getter presentation                # crbug.com/521319
+    method registerProtocolHandler     # crbug.com/589502
     method unregisterProtocolHandler   # crbug.com/589502
 
 # notifications not yet supported in webview, crbug.com/551446
@@ -53,33 +56,31 @@ interface ServiceWorkerRegistration : EventTarget
     method getNotifications
     method showNotification
 
-# crbug.com/589504
+# File System API disabled in WebView, crbug.com/589504, crbug.com/589843, b/6930981
 interface HTMLInputElement : HTMLElement
     getter webkitEntries
 
-# crbug.com/671461
+# MediaDevices devicechange disabled on Android, crbug.com/671461
 interface MediaDevices : EventTarget
     getter ondevicechange
     setter ondevicechange
 
-# TODO(timvolodine): investigate in more detail
 [GLOBAL OBJECT]
     method openDatabase
-    attribute layoutTestController
-    attribute eventSender
-    method webkitRequestFileSystem
-    attribute testRunner
-    attribute internals
-    attribute accessibilityController
-    attribute textInputController
+    attribute layoutTestController           # test only
+    attribute eventSender                    # test only
+    attribute testRunner                     # test only
+    attribute internals                      # test only
+    attribute accessibilityController        # test only
+    attribute textInputController            # test only
     attribute gin
-    attribute gamepadController
-    attribute GCController
-    getter speechSynthesis
-    attribute chrome                   # crbug.com/618471
-    method gc
-    method webkitResolveLocalFileSystemURL
+    attribute gamepadController              # test only
+    attribute GCController                   # test only
+    getter speechSynthesis                   # Speech API, crbug.com/487255
+    attribute chrome                         # crbug.com/618471
+    method gc                                # test only
+    method webkitRequestFileSystem           # File System API, crbug.com/589843
+    method webkitResolveLocalFileSystemURL   # File System API, crbug.com/589843
 
 # TODO(timvolodine): check screen orientation lock api
 # TODO(timvolodine): check notifications in service workers
-# TODO(timvolodine): add File System API