Fix pool dimension of 'Win 10 High-DPI Perf'

NOTRY=true
TBR=eyaich@chromium.org

Bug: 836446
Change-Id: Id47c16c1231fac76cf7f07bf8aa4f9bd7b5a1067
Reviewed-on: https://chromium-review.googlesource.com/1044307Reviewed-by: Ned Nguyen <nednguyen@google.com>
Commit-Queue: Ned Nguyen <nednguyen@google.com>
Cr-Commit-Position: refs/heads/master@{#556041}

tools/perf/core/perf_data_generator.py

@@ -251,7 +251,7 @@ def get_waterfall_config():
       {
        'gpu': '8086:1616',
        'os': 'Windows-10',
-       'pool': 'chrome.test.perf',
+       'pool': 'chrome.tests.perf',
        'device_ids': [
            'build194-b7', 'build195-b7',
            'build196-b7', 'build197-b7',