[iOS blink] iOS platform-specific rebaseline for fullscreen

These changes involve iOS platform-specific rebaselining
tests results in the web-platform-tests

- compositor-touch-hit-rects-fullscreen-video-controls-expected.txt
- full-screen-min-max-width-height-iframe-expected.txt
- full-screen-with-flex-item-expected.txt
: Added an iOS platform-specific expected test results.
  The window size sets to 980x735 in iOS platform from this CL
  (see https://crrev.com/c/4615623), which is different from window size of other platforms.
  Therefore, we should create rebaseline test results for ios.

The recommended approach for rebaseline utilizes blink_tool.py.
However, due to the unavailability of the iOS platform on
'tryserver.blink', these results are generated manually.

Bug: 1421239
Change-Id: I857683625b10fe3f840dff7dee6a3338ea79faf0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4861362
Reviewed-by: Ian Vollick <vollick@chromium.org>
Commit-Queue: Minju Kim <mkim@igalia.com>
Cr-Commit-Position: refs/heads/main@{#1209972}

third_party/blink/web_tests/platform/ios/fullscreen/compositor-touch-hit-rects-fullscreen-video-controls-expected.txt

@@ -0,0 +1,16 @@
+This test makes sure that touch hit rects are reported for fullscreen HTML5 video control elements even when there is a document handler.
+
+Should have single rect on document before fullscreen
+handler: layer(980x735) has hit test rect (0,0 980x735)
+handler: layer(980x735) has hit test rect (0,0 980x735)
+
+EVENT(webkitfullscreenchange)
+Should keep rect on document
+handler: layer(980x735) has hit test rect (0,0 980x735)
+handler: layer(980x735) has hit test rect (0,0 980x735)
+handler: layer(980x735) has hit test rect (0,0 980x735)
+handler: layer(980x735) has hit test rect (0,0 980x735)
+
+Found composited video layer, as expected
+END OF TEST
+

third_party/blink/web_tests/platform/ios/fullscreen/full-screen-min-max-width-height-iframe-expected.txt

@@ -0,0 +1,9 @@
+EVENT(webkitfullscreenchange)
+EXPECTED (computedStyle.minWidth == '0px') OK
+EXPECTED (computedStyle.maxWidth == 'none') OK
+EXPECTED (computedStyle.minHeight == '0px') OK
+EXPECTED (computedStyle.maxHeight == 'none') OK
+EXPECTED (computedStyle.width == '980px') OK
+EXPECTED (computedStyle.height == '735px') OK
+END OF TEST
+

third_party/blink/web_tests/platform/ios/fullscreen/full-screen-with-flex-item-expected.txt

@@ -0,0 +1,6 @@
+Enter Fullscreen
+EVENT(webkitfullscreenchange)
+EVENT(webkitfullscreenchange)
+EXPECTED (735 == '735') OK
+END OF TEST
+