Add storage_unittests to buildbots.

testing/buildbot/chromium.linux.json

 {
   "Android Arm64 Builder (dbg)": {
     "additional_compile_targets": [
       "all"
     ]
   },
   "Android Builder": {
     "additional_compile_targets": [
       "cronet_test_instrumentation_apk",
       "system_webview_apk"
@@ skipping 1092 matching lines @@
                 "=android%2Fswarming%2Flogcats%2F",
                 "${TASK_ID}%2F%2B%2Funified_logcats"
               ],
               "name": "shard #${SHARD_INDEX} logcats"
             }
           ]
         },
         "test": "sql_unittests"
       },
       {
+        "override_isolate_target": "storage_unittests",
+        "swarming": {
+          "can_use_on_swarming_builders": true,
+          "cipd_packages": [
+            {
+              "cipd_package": "infra/tools/luci/logdog/butler/${platform}",
+              "location": "bin",
+              "revision": "git_revision:3ff24775a900b675866fbcacf2a8f98a18b2a16a"
+            }
+          ],
+          "dimension_sets": [
+            {
+              "android_devices": "4",
+              "device_os": "KTU84P",
+              "device_type": "hammerhead"
+            }
+          ],
+          "output_links": [
+            {
+              "link": [
+                "https://luci-logdog.appspot.com/v/?s",
+                "=android%2Fswarming%2Flogcats%2F",
+                "${TASK_ID}%2F%2B%2Funified_logcats"
+              ],
+              "name": "shard #${SHARD_INDEX} logcats"
+            }
+          ]
+        },
+        "test": "storage_unittests"
+      },
+      {
         "override_isolate_target": "ui_android_unittests",
         "swarming": {
           "can_use_on_swarming_builders": true,
           "cipd_packages": [
             {
               "cipd_package": "infra/tools/luci/logdog/butler/${platform}",
               "location": "bin",
               "revision": "git_revision:3ff24775a900b675866fbcacf2a8f98a18b2a16a"
             }
           ],
@@ skipping 258 matching lines @@
       {
         "override_compile_targets": [
           "sandbox_linux_unittests"
         ],
         "test": "sandbox_linux_unittests"
       },
       {
         "test": "sql_unittests"
       },
       {
+        "test": "storage_unittests"
+      },
+      {
         "test": "ui_android_unittests"
       },
       {
         "test": "ui_base_unittests"
       },
       {
         "test": "ui_touch_selection_unittests"
       },
       {
         "test": "unit_tests"
@@ skipping 220 matching lines @@
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "sql_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "storage_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "ui_base_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "url_unittests"
       }
     ]
   },
@@ skipping 469 matching lines @@
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "sql_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "storage_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "sync_integration_tests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "ui_base_unittests"
       },
       {
         "swarming": {
@@ skipping 516 matching lines @@
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "sql_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "storage_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "sync_integration_tests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "ui_base_unittests"
       },
       {
         "swarming": {
@@ skipping 361 matching lines @@
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "sql_unittests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
+        "test": "storage_unittests"
+      },
+      {
+        "swarming": {
+          "can_use_on_swarming_builders": true
+        },
         "test": "sync_integration_tests"
       },
       {
         "swarming": {
           "can_use_on_swarming_builders": true
         },
         "test": "ui_base_unittests"
       },
       {
         "swarming": {
@@ skipping 37 matching lines @@
         "override_compile_targets": [
           "telemetry_unittests_run"
         ],
         "swarming": {
           "can_use_on_swarming_builders": true
         }
       }
     ]
   }
 }