[testing] Partially revert logging in unit tests

Now that we found the mystery CI unit test failure, we no longer need
the detailed logs. This CL reverts parts of https://crrev.com/c/7664899.

We don't need the "PASS:" line for every test, but we keep the `--v=1`
chrome log since it's not expensive and somewhat useful.

R=kimanh@chromium.org

Bug: None
Change-Id: I4025c73d18605e73d79e7fb98bab9522ed78e9bc
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/7672597
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>
Auto-Submit: Simon Zünd <szuend@chromium.org>

Author: szuend

test/conductor/karma-resultsdb-reporter.ts

@@ -126,11 +126,6 @@ export const ResultsDBReporter = function(
       }
     } else if (skipped) {
       this.write(`==== ${status}: ${testId}\n\n`);
-    } else {
-      // TODO(szuend): Only here temporarily to investigate random karma disconnects.
-      //               We'll remove this `else` branch again once we figure out what is
-      //               going on.
-      this.write(`==== ${status}: ${testId}\n\n`);
     }
 
     const testResult: ResultsDb.TestResult = {testId, duration, status, expected, summaryHtml};

test/unit/karma.conf.ts

@@ -151,7 +151,7 @@ const CustomChrome = function(this: any, _baseBrowserDecorator: unknown, args: B
       '--enable-crash-reporter-for-testing',  // Works only on linux
       `--crash-dumps-dir=${TestConfig.artifactsDir}`,
       '--enable-logging',
-      '--v=2',
+      '--v=1',
       `--log-file=${path.join(TestConfig.artifactsDir, 'chrome-log.txt')}`,
       ...flagsDisabledWithDebugging,
       ...args.flags,