Apply max_msaa_sample_count_4 on Win Intel

MSAA8 is slow for WebGL contexts. Currently MacOS and ChromeOS also
use MSAA4 on Intel.

Bug: 1145793
Change-Id: I8f29889de165c18a99616a2c2bfb74bf0d110182
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2522615
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Reviewed-by: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824944}

gpu/config/gpu_driver_bug_list.json

@@ -3646,6 +3646,18 @@
       "disabled_extensions": [
         "GL_OES_depth_texture"
       ]
-    }
+    },
+    {
+      "id": 360,
+      "description": "8x MSAA for WebGL contexts is slow on Win Intel",
+      "cr_bugs": [1145793],
+      "os": {
+        "type": "win"
+      },
+      "vendor_id": "0x8086",
+      "features": [
+        "max_msaa_sample_count_4"
+      ]
+    } 
   ]
 }