Add angle_white_box_tests for linux

Bug: angleproject:2362
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: I0cc7aa1b2a0e00009f1184bb1c97e40d809cf032
Reviewed-on: https://chromium-review.googlesource.com/927201Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Luc Ferron <lucferron@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537887}

content/test/gpu/generate_buildbot_json.py

@@ -1466,9 +1466,7 @@ COMMON_GTESTS = {
     'tester_configs': [
       {
         'predicate': Predicates.FYI_AND_OPTIONAL_AND_WIN_ANGLE_AMD,
-        # There are only Windows white box tests for now.
-        # Enable on more configs when there will be relevant tests.
-        'os_types': ['win'],
+        'os_types': ['win', 'linux'],
       },
     ],
     'disabled_tester_configs': [

testing/buildbot/chromium.gpu.fyi.json

@@ -2668,6 +2668,23 @@
         "test": "angle_unittests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "10de:1cb3-384.90",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--use-gpu-in-tests",
@@ -3082,6 +3099,23 @@
         "test": "angle_unittests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "10de:1cb3-384.90",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--use-gpu-in-tests",
@@ -3234,6 +3268,23 @@
         "test": "angle_unittests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "1002:6613",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--enable-gpu",
@@ -3692,6 +3743,23 @@
         "test": "angle_unittests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "8086:5912",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--enable-gpu",
@@ -4156,6 +4224,23 @@
         "test": "angle_unittests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "10de:1cb3-384.90",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--enable-gpu",
@@ -9893,6 +9978,23 @@
         "test": "angle_end2end_tests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "8086:5912",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--use-gpu-in-tests"
@@ -10031,6 +10133,23 @@
         "test": "angle_end2end_tests",
         "use_xvfb": false
       },
+      {
+        "args": [
+          "--test-launcher-retry-limit=0"
+        ],
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "gpu": "10de:1cb3-384.90",
+              "os": "Ubuntu",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        },
+        "test": "angle_white_box_tests",
+        "use_xvfb": false
+      },
       {
         "args": [
           "--use-gpu-in-tests"