Add XRInputSource.profiles

For now, it will always be an empty array. Populating the array will
come in a later CL.

Bug: 979250
Change-Id: I7dabbec261f280d6937d57a9076033b3b7e09f3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1724277Reviewed-by: Alexander Cooper <alcooper@chromium.org>
Commit-Queue: Jacob DeWitt <jacde@chromium.org>
Cr-Commit-Position: refs/heads/master@{#682324}

third_party/blink/renderer/modules/xr/xr_input_source.h

@@ -55,6 +55,7 @@ class XRInputSource : public ScriptWrappable, public Gamepad::Client {
   XRSpace* targetRaySpace() const;
   XRSpace* gripSpace() const;
   Gamepad* gamepad() const { return gamepad_; }
+  Vector<String> profiles() const { return profiles_; }
 
   uint32_t source_id() const { return state_.source_id; }
 
@@ -129,6 +130,7 @@ class XRInputSource : public ScriptWrappable, public Gamepad::Client {
   Member<XRTargetRaySpace> target_ray_space_;
   Member<XRGripSpace> grip_space_;
   Member<Gamepad> gamepad_;
+  Vector<String> profiles_;
 
   std::unique_ptr<TransformationMatrix> base_pose_matrix_;
 

third_party/blink/renderer/modules/xr/xr_input_source.idl

@@ -24,4 +24,5 @@ enum XRTargetRayMode {
   [SameObject] readonly attribute XRSpace targetRaySpace;
   [SameObject] readonly attribute XRSpace? gripSpace;
   [SameObject, Measure] readonly attribute Gamepad? gamepad;
+  [SameObject] readonly attribute FrozenArray<DOMString> profiles;
 };

third_party/blink/web_tests/external/wpt/webxr/idlharness.https.window-expected.txt

 This is a testharness.js-based test.
-Found 202 tests; 199 PASS, 3 FAIL, 0 TIMEOUT, 0 NOTRUN.
+Found 202 tests; 200 PASS, 2 FAIL, 0 TIMEOUT, 0 NOTRUN.
 PASS idl_test setup
 PASS Partial interface Navigator: original interface defined
 PASS Partial dictionary WebGLContextAttributes: original dictionary defined
@@ -145,7 +145,7 @@ PASS XRInputSource interface: attribute targetRayMode
 PASS XRInputSource interface: attribute targetRaySpace
 PASS XRInputSource interface: attribute gripSpace
 PASS XRInputSource interface: attribute gamepad
-FAIL XRInputSource interface: attribute profiles assert_true: The prototype object must have a property "profiles" expected true got false
+PASS XRInputSource interface: attribute profiles
 PASS XRInputSourceArray interface: existence and properties of interface object
 PASS XRInputSourceArray interface object length
 PASS XRInputSourceArray interface object name

third_party/blink/web_tests/webexposed/global-interface-listing-expected.txt

@@ -10685,6 +10685,7 @@ interface XRInputSource
     getter gamepad
     getter gripSpace
     getter handedness
+    getter profiles
     getter targetRayMode
     getter targetRaySpace
     method constructor