Require Fuchsia arm64 test swarming bots to run in docker containers.

This helps to standardize the environment for the Fuchsia VM.
In particular, it prevents tests from running on build41-b4 which
is not set up to run Fuchsia arm64 KVM tests.

Bug: 1000901
Change-Id: I0030cb7dc807829404590f23cdb4a8595f93b1a4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1918312Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Stephen Roe <steveroe@google.com>
Cr-Commit-Position: refs/heads/master@{#715932}

testing/buildbot/chromium.fyi.json

@@ -11395,6 +11395,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11411,6 +11412,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11427,6 +11429,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11443,6 +11446,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11459,6 +11463,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11475,6 +11480,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11491,6 +11497,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11507,6 +11514,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11526,6 +11534,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11545,6 +11554,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11561,6 +11571,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11577,6 +11588,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11593,6 +11605,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11609,6 +11622,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11625,6 +11639,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11641,6 +11656,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11657,6 +11673,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11673,6 +11690,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11689,6 +11707,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11705,6 +11724,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11724,6 +11744,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11740,6 +11761,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11756,6 +11778,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11775,6 +11798,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11791,6 +11815,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11807,6 +11832,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11826,6 +11852,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11845,6 +11872,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11861,6 +11889,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11877,6 +11906,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11893,6 +11923,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]
@@ -11909,6 +11940,7 @@
           "dimension_sets": [
             {
               "cpu": "arm64",
+              "inside_docker": "1",
               "os": "Ubuntu-16.04"
             }
           ]

testing/buildbot/mixins.pyl

@@ -167,6 +167,13 @@
   'code-coverage': {
     'isolate_coverage_data': True,
   },
+  'docker': {
+    'swarming': {
+      'dimensions': {
+        'inside_docker': '1',
+      },
+    },
+  },
   'flounder': {
     # Nexus 9
     'swarming': {

testing/buildbot/waterfalls.pyl

@@ -1736,6 +1736,7 @@
         },
         'mixins': [
           'arm64',
+          'docker',
           'linux-xenial',
         ],
       },