Test Linux 1660 machines

Switches the GPU experimental Linux NVIDIA builder to trigger tests on
the new machines running GTX 1660 GPUs.

Submitting with no-try since the only failures are crbug.com/1115172.

No-Try: true
Bug: 1042292, 1115314
Change-Id: I800f38e1bde84b156d8abfb05ae8816e66b36f68
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2346801
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797380}

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

@@ -762,6 +762,9 @@ crbug.com/703779 [ opengl linux nvidia-0x1cb3 ] deqp/functional/gles3/fbocomplet
 # Linux / OpenGL / NVIDIA failures
 crbug.com/angleproject/4555 [ linux opengl passthrough nvidia ] conformance/misc/type-conversion-test.html [ Skip ]
 
+# Linux GTX 1660
+crbug.com/1115314 [ linux nvidia-0x2184 opengl passthrough ] deqp/functional/gles3/fbocompleteness.html [ Failure ]
+
 # Linux AMD only.
 # It looks like AMD shader compiler rejects many valid ES3 semantics.
 crbug.com/766776 [ linux amd ] conformance2/attribs/gl-vertex-attrib-normalized-int.html [ Failure ]

testing/buildbot/mixins.pyl

@@ -395,12 +395,12 @@
       'expiration': 14400,
     }
   },
-  'linux_nvidia_quadro_p400_experimental': {
+  'linux_nvidia_gtx_1660_experimental': {
     'swarming': {
       'dimensions': {
-        'gpu': '10de:1cb3-418.56',
-        'os': 'Ubuntu-19.04',
-        'pool': 'chromium.tests.gpu',
+        'gpu': '10de:2184-440.100',
+        'os': 'Ubuntu-18.04',
+        'pool': 'chromium.tests.gpu.experimental',
       },
     },
   },

testing/buildbot/waterfalls.pyl

@@ -3340,13 +3340,15 @@
         'browser_config': 'release',
         'mixins': [
           'limited_capacity_bot',
-          'linux_nvidia_quadro_p400_experimental',
+          'linux_nvidia_gtx_1660_experimental',
         ],
-        # Currently the experimental driver is identical to the stable
-        # driver. If it's upgraded, change these test_suites to be the same as
-        # 'Linux FYI Release (NVIDIA)'.
+        # If the experimental configuration is the same as stable, this should
+        # only be running 'gpu_noop_sleep_telemetry_test'. Otherwise, this
+        # should be running the same tests as 'Linux FYI Release (NVIDIA)'.
         'test_suites': {
-          'gpu_telemetry_tests': 'gpu_noop_sleep_telemetry_test',
+          'gtest_tests': 'gpu_fyi_linux_release_gtests',
+          'isolated_scripts': 'gpu_angle_perf_smoke_isolated_scripts',
+          'gpu_telemetry_tests': 'gpu_fyi_linux_intel_and_nvidia_release_telemetry_tests',
         },
       },
       'Linux FYI GPU TSAN Release': {