Re-enable tests on MacBook Pro Retina with NVIDIA GPUs.

testing/buildbot/chromium.gpu.json

 {
   "AAAAA1 AUTOGENERATED FILE DO NOT EDIT": {},
   "AAAAA2 See generate_buildbot_json.py to make changes": {},
   "GPU Linux Builder": {},
   "GPU Linux Builder (dbg)": {},
   "GPU Mac Builder": {},
   "GPU Mac Builder (dbg)": {},
   "GPU Win Builder": {},
   "GPU Win Builder (dbg)": {},
   "Linux Debug (NVIDIA)": {
@@ skipping 1852 matching lines @@
             {
               "gpu": "1002:6821",
               "hidpi": "1",
               "os": "Mac-10.10"
             }
           ]
         }
       }
     ]
   },
-  "Mac Retina Debug": {
-    "gtest_tests": [],
-    "isolated_scripts": []
-  },
-  "Mac Retina Release": {
-    "gtest_tests": [],
-    "isolated_scripts": [
-      {
-        "args": [
-          "maps",
-          "--show-stdout",
-          "--browser=release",
-          "-v",
-          "--extra-browser-args=--enable-logging=stderr --js-flags=--expose-gc"
-        ],
-        "isolate_name": "telemetry_gpu_test",
-        "name": "maps_pixel_test",
-        "override_compile_targets": [
-          "telemetry_gpu_test_run"
-        ],
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "gpu": "10de:0fe9",
-              "hidpi": "1",
-              "os": "Mac"
-            }
-          ]
-        }
-      },
-      {
-        "args": [
-          "pixel",
-          "--show-stdout",
-          "--browser=release",
-          "-v",
-          "--extra-browser-args=--enable-logging=stderr --js-flags=--expose-gc",
-          "--refimg-cloud-storage-bucket",
-          "chromium-gpu-archive/reference-images",
-          "--os-type",
-          "mac",
-          "--build-revision",
-          "${got_revision}",
-          "--test-machine-name",
-          "${buildername}"
-        ],
-        "isolate_name": "telemetry_gpu_test",
-        "name": "pixel_test",
-        "non_precommit_args": [
-          "--upload-refimg-to-cloud-storage"
-        ],
-        "override_compile_targets": [
-          "telemetry_gpu_test_run"
-        ],
-        "precommit_args": [
-          "--download-refimg-from-cloud-storage"
-        ],
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "gpu": "10de:0fe9",
-              "hidpi": "1",
-              "os": "Mac"
-            }
-          ]
-        }
-      },
-      {
-        "args": [
-          "webgl_conformance",
-          "--show-stdout",
-          "--browser=release",
-          "-v",
-          "--extra-browser-args=--enable-logging=stderr --js-flags=--expose-gc"
-        ],
-        "isolate_name": "telemetry_gpu_test",
-        "name": "webgl_conformance_tests",
-        "override_compile_targets": [
-          "telemetry_gpu_test_run"
-        ],
-        "swarming": {
-          "can_use_on_swarming_builders": true,
-          "dimension_sets": [
-            {
-              "gpu": "10de:0fe9",
-              "hidpi": "1",
-              "os": "Mac"
-            }
-          ]
-        }
-      }
-    ]
-  },
   "Win7 Debug (NVIDIA)": {
     "gtest_tests": [
       {
         "args": [
           "--use-gpu-in-tests"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true,
           "dimension_sets": [
             {
@@ skipping 907 matching lines @@
             {
               "gpu": "10de:104a",
               "os": "Windows-2008ServerR2-SP1"
             }
           ]
         }
       }
     ]
   }
 }