[ios] Adds tests to ios12-beta-simulator.

BUG=934252

Change-Id: Ib7f68a0c9997ad4638cdb884e5099fcca8402a87
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1849995Reviewed-by: Justin Cohen <justincohen@chromium.org>
Commit-Queue: Rohit Rao <rohitrao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#704226}

ios/build/bots/chromium.fyi/ios12-beta-simulator.json

@@ -13,5 +13,95 @@
     "use_goma=true"
   ],
   "tests": [
+    {
+      "include": "common_tests.json",
+      "device type": "iPhone X",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+    },
+    {
+      "include": "screen_size_dependent_tests.json",
+      "device type": "iPhone X",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+    },
+    {
+      "include": "eg_tests.json",
+      "device type": "iPhone X",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+
+    },
+    {
+      "include": "eg_cq_tests.json",
+      "device type": "iPhone X",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+    },
+    {
+      "include": "common_tests.json",
+      "device type": "iPad Air 2",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+    },
+    {
+      "include": "screen_size_dependent_tests.json",
+      "device type": "iPad Air 2",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+    },
+    {
+      "include": "eg_tests.json",
+      "device type": "iPad Air 2",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+
+    },
+    {
+      "include": "eg_cq_tests.json",
+      "device type": "iPad Air 2",
+      "os": "13.1",
+      "xcode build version": "11a1027",
+      "host os": "Mac-10.14.6",
+      "pool":"Chrome",
+      "test args": [
+        "--run-with-custom-webkit"
+      ]
+    }
   ]
 }