Migrate all perf fyi bots to use private swarming server

NOTRY=true  # test by PRESUBMIT
TBR=eyaich@chromium.org

Bug: 857395
Change-Id: I2f8038451a7669f162efdbbe0388a705c7f88407
Reviewed-on: https://chromium-review.googlesource.com/1123270Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#572004}

testing/buildbot/chromium.perf.fyi.json

@@ -562,7 +562,7 @@
             {
               "gpu": "8086:0a2e",
               "os": "Mac-10.12",
-              "pool": "Chrome-perf-fyi"
+              "pool": "chrome.tests.perf-fyi"
             }
           ],
           "expiration": 36000,
@@ -606,7 +606,7 @@
             {
               "gpu": "8086:0a2e",
               "os": "Mac-10.12",
-              "pool": "Chrome-perf-fyi"
+              "pool": "chrome.tests.perf-fyi"
             }
           ],
           "expiration": 36000,
@@ -647,7 +647,7 @@
             {
               "gpu": "8086:0a2e",
               "os": "Mac-10.12",
-              "pool": "Chrome-perf-fyi"
+              "pool": "chrome.tests.perf-fyi"
             }
           ],
           "expiration": 36000,

tools/perf/core/perf_data_generator.py

@@ -857,7 +857,7 @@ NEW_PERF_RECIPE_FYI_TESTERS = {
       ],
       'platform': 'mac',
       'dimension': {
-        'pool': 'Chrome-perf-fyi',
+        'pool': 'chrome.tests.perf-fyi',
         'os': 'Mac-10.12',
         'gpu': '8086:0a2e'
       },

tools/perf/core/perf_json_config_validator.py

@@ -12,7 +12,7 @@ _VALID_SWARMING_DIMENSIONS = {
     'gpu', 'device_ids', 'os', 'pool', 'perf_tests', 'perf_tests_with_args',
     'device_os', 'device_type', 'device_os_flavor', 'id'}
 _VALID_PERF_POOLS = {
-    'Chrome-perf', 'Chrome-perf-fyi',
+    'Chrome-perf',
     'chrome.tests.perf', 'chrome.tests.perf-webview',
     'chrome.tests.perf-fyi', 'chrome.tests.perf-webview-fyi'}