Re-enable angle_perftests on Nexus 5.

Bug: 860800
Change-Id: I131f5e7a73d435f0d55788cea351f14a34039526
Tbr: geofflang@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/1138549Reviewed-by: Kenneth Russell <kbr@chromium.org>
Commit-Queue: Kenneth Russell <kbr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575377}

testing/buildbot/chromium.gpu.fyi.json

@@ -1160,6 +1160,25 @@
       }
     ],
     "isolated_scripts": [
+      {
+        "args": [
+          "-v",
+          "--one-frame-only"
+        ],
+        "isolate_name": "angle_perftests",
+        "name": "angle_perftests",
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "dimension_sets": [
+            {
+              "device_os": "L",
+              "device_type": "hammerhead",
+              "os": "Android",
+              "pool": "Chrome-GPU"
+            }
+          ]
+        }
+      },
       {
         "args": [
           "context_lost",

testing/buildbot/test_suite_exceptions.pyl

@@ -39,7 +39,6 @@
   },
   'angle_perftests': {
     'remove_from': [
-      'Android FYI Release (Nexus 5)',  # crbug.com/860800
       'Android FYI Release (Nexus 6)',  # anglebug.com/2433
     ],
   },