Roll WebGL c1d5cef..71413e9

https://chromium.googlesource.com/external/khronosgroup/webgl.git/+log/c1d5cef..71413e9

Cq-Include-Trybots: luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux-angle-rel;luci.chromium.try:win-angle-rel-32;luci.chromium.try:win-angle-rel-64
Change-Id: I9ad35d0700b17584cad73f851c603c591636b7e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2422320
Commit-Queue: James Darpinian <jdarpinian@chromium.org>
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Shrek Shao <shrekshao@google.com>
Auto-Submit: James Darpinian <jdarpinian@chromium.org>
Cr-Commit-Position: refs/heads/master@{#809629}

DEPS

@@ -1470,7 +1470,7 @@ deps = {
     Var('chromium_git') + '/external/github.com/SeleniumHQ/selenium/py.git' + '@' + 'd0045ec570c1a77612db35d1e92f05e1d27b4d53',
 
   'src/third_party/webgl/src':
-    Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + 'c1d5cef72529f787f6d83f9da26b1cec7194d665',
+    Var('chromium_git') + '/external/khronosgroup/webgl.git' + '@' + '71413e9fa57e16fad0e8a94b8c208813cc3dabcf',
 
   'src/third_party/webgpu-cts/src':
     Var('chromium_git') + '/external/github.com/gpuweb/cts.git' + '@' + 'a60596ec57527c989f1beaa37fc4bf1aa22bf084',

content/test/gpu/gpu_tests/test_expectations/webgl2_conformance_expectations.txt

@@ -71,6 +71,7 @@ crbug.com/891861 [ android no-passthrough ] WebglExtension_WEBGL_multi_draw_inst
 # ========================
 
 # Failing new updated tests
+crbug.com/1131224 conformance2/rendering/framebuffer-mismatched-attachment-targets.html [ Failure ]
 crbug.com/1108044 conformance2/renderbuffers/readbuffer.html [ Failure ]
 crbug.com/1108086 [ no-passthrough ] conformance2/renderbuffers/framebuffer-object-attachment.html [ Failure ]
 crbug.com/angleproject/4807 [ win d3d11 passthrough ] conformance2/glsl3/switch-case.html [ Failure ]

content/test/gpu/gpu_tests/webgl_conformance_revision.txt

 # AUTOGENERATED FILE - DO NOT EDIT
 # SEE roll_webgl_conformance.py
-Current webgl revision c1d5cef72529f787f6d83f9da26b1cec7194d665
+Current webgl revision 71413e9fa57e16fad0e8a94b8c208813cc3dabcf