Fix a minor indentation issue

Change-Id: I275ba2cdbb901f4fff0651f11dab08eacdc8c46f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1635865
Commit-Queue: Haiyang Pan <hypan@google.com>
Commit-Queue: Caleb Rouleau <crouleau@chromium.org>
Auto-Submit: Haiyang Pan <hypan@google.com>
Reviewed-by: Caleb Rouleau <crouleau@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664526}

tools/perf/core/perf_data_generator.py

@@ -423,7 +423,7 @@ BUILDERS = {
       }
     ],
     'platform': 'android-chrome',
-      'browser': 'bin/monochrome_64_32_bundle',
+    'browser': 'bin/monochrome_64_32_bundle',
     'dimension': {
       'pool': 'chrome.tests.perf',
       'os': 'Android',