[RemotePlayback] Added IDL harness WebPlatform test for RemotePlayback API.

third_party/WebKit/LayoutTests/external/wpt/remote-playback/idlharness-expected.txt

Index: third_party/WebKit/LayoutTests/external/wpt/remote-playback/idlharness-expected.txt
diff --git a/third_party/WebKit/LayoutTests/external/wpt/remote-playback/idlharness-expected.txt b/third_party/WebKit/LayoutTests/external/wpt/remote-playback/idlharness-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..dec28fb8c86f30454e92baf03e9bca844fa17096
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/external/wpt/remote-playback/idlharness-expected.txt
@@ -0,0 +1,38 @@
+This is a testharness.js-based test.
+PASS HTMLMediaElement interface: attribute remote 
+PASS HTMLMediaElement interface: attribute disableRemotePlayback 
+FAIL HTMLMediaElement must be primary interface of [object HTMLUnknownElement] assert_equals: [object HTMLUnknownElement]'s prototype is not HTMLMediaElement.prototype expected object "[object HTMLMediaElement]" but got object "[object HTMLUnknownElement]"

[foolip, 2017/05/08 14:58:03]

This is because of <media> in the test instead of <video>. Can you go over the
failures and see if there's anything else that's a legitimate problem?

[whywhat, 2017/05/08 17:31:45]

TBH I'm confused about this. <media> is not a valid tag, is it? If I use <video>
though the test complains that it's not an HTMLMediaElement. I copy-pasted this
<media> from the mediastream capturefromelement idl test and then saw that they
just have this expectation...

Then all this failures when passing null as the object to the method?

[foolip, 2017/05/08 20:15:42]

<media> isn't a known HTML element, so it ends up as HTMLUnknownElement, like
<banana>.

What you've run into might be a problem with idlharness.js, if it assumes that
the object you pass in is of exactly the expected type, and not a derived type.
If that's the case and can't be controlled in any way, can you file an issue at
https://github.com/w3c/web-platform-tests/issues? If you can find a fix, it's OK
to put it in this CL too of course.

+FAIL Stringification of [object HTMLUnknownElement] assert_equals: class string of [object HTMLUnknownElement] expected "[object HTMLMediaElement]" but got "[object HTMLUnknownElement]"
+FAIL HTMLMediaElement interface: [object HTMLUnknownElement] must inherit property "remote" with the proper type (0) assert_inherits: property "remote" not found in prototype chain
+FAIL HTMLMediaElement interface: [object HTMLUnknownElement] must inherit property "disableRemotePlayback" with the proper type (1) assert_inherits: property "disableRemotePlayback" not found in prototype chain
+FAIL RemotePlayback interface: existence and properties of interface object Cannot read property 'has_extended_attribute' of undefined
+PASS RemotePlayback interface object length 
+PASS RemotePlayback interface object name 
+FAIL RemotePlayback interface: existence and properties of interface prototype object Cannot read property 'has_extended_attribute' of undefined
+PASS RemotePlayback interface: existence and properties of interface prototype object's "constructor" property 
+PASS RemotePlayback interface: attribute state 
+PASS RemotePlayback interface: attribute onconnecting 
+PASS RemotePlayback interface: attribute onconnect 
+PASS RemotePlayback interface: attribute ondisconnect 
+FAIL RemotePlayback interface: operation watchAvailability(RemotePlaybackAvailabilityCallback) assert_throws: calling operation with this = null didn't throw TypeError function "function () {
+            fn.apply(obj, args);
+        }" did not throw
+FAIL RemotePlayback interface: operation cancelWatchAvailability(long) assert_throws: calling operation with this = null didn't throw TypeError function "function () {
+            fn.apply(obj, args);
+        }" did not throw
+FAIL RemotePlayback interface: operation prompt() assert_throws: calling operation with this = null didn't throw TypeError function "function () {
+            fn.apply(obj, args);
+        }" did not throw
+FAIL RemotePlayback must be primary interface of undefined assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL Stringification of undefined assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "state" with the proper type (0) assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "onconnecting" with the proper type (1) assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "onconnect" with the proper type (2) assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "ondisconnect" with the proper type (3) assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "watchAvailability" with the proper type (4) assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: calling watchAvailability(RemotePlaybackAvailabilityCallback) on undefined with too few arguments must throw TypeError assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "cancelWatchAvailability" with the proper type (5) assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: calling cancelWatchAvailability(long) on undefined with too few arguments must throw TypeError assert_equals: wrong typeof object expected "object" but got "undefined"
+FAIL RemotePlayback interface: undefined must inherit property "prompt" with the proper type (6) assert_equals: wrong typeof object expected "object" but got "undefined"
+Harness: the test ran to completion.
+