wpt: screen enumeration: split screen ID settings

Split setIds(internalId, primaryId) into 2 distinct methods,
setInternalId(id) and setPrimaryId(id).

Bug: 1075656
Change-Id: I312950db43d0044cbaf923e458912816a06834e7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2245616
Commit-Queue: Arnaud Mandy <arnaud.mandy@intel.com>
Reviewed-by: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781530}

third_party/blink/web_tests/external/wpt/resources/chromium/mock-screenenumeration.js

@@ -20,8 +20,11 @@ var ScreenEnumerationTest = (() => {
       this.success_ = false;
     }
 
-    setIds(internalId, primaryId) {
+    setInternalId(internalId) {
       this.internalId_ = internalId;
+    }
+
+    setPrimaryId(primaryId) {
       this.primaryId_ = primaryId;
     }
 

third_party/blink/web_tests/external/wpt/screen_enumeration/README.md

@@ -13,7 +13,8 @@ The `ScreenEnumerationTest` interface is defined as:
 
   class MockScreenEnumeration {
     reset(); Empties data of created mock displays.
-    setId(internalId, primaryId); // Set primary screen and internal screen IDs.
+    setInternalId(internalId); // Set internal screen ID.
+    setPrimaryId(primaryId); // Set primary screen ID.
     setSuccess(success); // Set boolean to validate getDisplays() returned values.
     addDisplay(display); // Push display to the display vector.
     removeDisplay(id); // Remove display from the display vector.

third_party/blink/web_tests/external/wpt/screen_enumeration/getScreens.values.https.html

@@ -17,7 +17,8 @@ screen_enumeration_test(async (t, mockScreenEnum) => {
                              1.0);
 
   mockScreenEnum.addDisplay(display1);
-  mockScreenEnum.setIds(mockScreenEnum.displays_[0].id, mockScreenEnum.displays_[0].id);
+  mockScreenEnum.setPrimaryId(mockScreenEnum.displays_[0].id);
+  mockScreenEnum.setInternalId(mockScreenEnum.displays_[0].id);
   mockScreenEnum.setSuccess(true);
 
   // Grant window-placement permissions for testdriver.
@@ -61,7 +62,8 @@ screen_enumeration_test(async (t, mockScreenEnum) => {
   mockScreenEnum.addDisplay(display1);
   mockScreenEnum.addDisplay(display2);
   mockScreenEnum.addDisplay(display3);
-  mockScreenEnum.setIds(mockScreenEnum.displays_[0].id, mockScreenEnum.displays_[0].id);
+  mockScreenEnum.setPrimaryId(mockScreenEnum.displays_[0].id);
+  mockScreenEnum.setInternalId(mockScreenEnum.displays_[0].id);
   mockScreenEnum.setSuccess(true);
 
   // Grant window-placement permissions for testdriver.