Use embedder frame in WebVideoPermissionHelper::CheckMediaAccessPermission

This CL makes CheckMediaAccessPermission pass the main RenderFrameHost
of the embedder WebContents instead of the original RenderFrameHost.

This makes it work similarly to RequestMediaAccessPermission(), which
uses the embedder WebContents instead of the original WebContents, and
fixes an issue with device enumerations when using ChromeOS logins,
where the permission check always failed.
Note that CheckMediaAccessPermission() originally used the embedder
WebContents until the switch to RenderFrameHost in crrev.com/540967.

Bug: 1086756
Change-Id: I5342c8d2617144caca7e451af0f12f31b5c6bb5e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2294807Reviewed-by: Lucas Gadani <lfg@chromium.org>
Reviewed-by: Kinuko Yasuda <kinuko@chromium.org>
Commit-Queue: Guido Urdaneta <guidou@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791201}

content/browser/renderer_host/media/media_devices_dispatcher_host_unittest.cc

@@ -282,7 +282,7 @@ class MediaDevicesDispatcherHostTest
           enumerated_devices_[blink::MEDIA_DEVICE_TYPE_AUDIO_OUTPUT].empty());
 
     EXPECT_FALSE(DoesContainRawIds(enumerated_devices_));
-#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+#if defined(OS_ANDROID)
     EXPECT_TRUE(DoesEveryDeviceMapToRawId(enumerated_devices_, origin_));
 #else
     EXPECT_EQ(DoesEveryDeviceMapToRawId(enumerated_devices_, origin_),

content/public/common/content_features.cc

@@ -193,7 +193,7 @@ const base::Feature kEnableNewCanvas2DAPI{"EnableNewCanvas2DAPI",
 // TODO(crbug.com/1019176): remove the feature in M89.
 const base::Feature kEnumerateDevicesHideDeviceIDs{
   "EnumerateDevicesHideDeviceIDs",
-#if defined(OS_ANDROID) || defined(OS_CHROMEOS)
+#if defined(OS_ANDROID)
       base::FEATURE_DISABLED_BY_DEFAULT
 #else
       base::FEATURE_ENABLED_BY_DEFAULT

extensions/browser/guest_view/web_view/web_view_permission_helper.cc

@@ -214,7 +214,9 @@ bool WebViewPermissionHelper::CheckMediaAccessPermission(
   return web_view_guest()
       ->embedder_web_contents()
       ->GetDelegate()
-      ->CheckMediaAccessPermission(render_frame_host, security_origin, type);
+      ->CheckMediaAccessPermission(
+          web_view_guest()->web_contents()->GetOuterWebContentsFrame(),
+          security_origin, type);
 }
 
 void WebViewPermissionHelper::OnMediaPermissionResponse(