Runs initMiscAndroidMetrics from an UI thread in case of connection failure

[SergeyZhukovsky]

Resolves brave/brave-browser#34649

Submitter Checklist:

• I confirm that no security/privacy review is needed and no other type of reviews are needed, or that I have requested them
• There is a ticket for my issue
• Used Github auto-closing keywords in the PR description above
• Wrote a good PR/commit description
• Squashed any review feedback or "fixup" commits before merge, so that history is a record of what happened in the repo, not your PR
• Added appropriate labels (QA/Yes or QA/No; release-notes/include or release-notes/exclude; OS/...) to the associated issue
• Checked the PR locally:
  • npm run test -- brave_browser_tests, npm run test -- brave_unit_tests wiki
  • npm run lint, npm run presubmit wiki, npm run gn_check, npm run tslint
• Ran git rebase master (if needed)

Reviewer Checklist:

• A security review is not needed, or a link to one is included in the PR description
• New files have MPL-2.0 license header
• Adequate test coverage exists to prevent regressions
• Major classes, functions and non-trivial code blocks are well-commented
• Changes in component dependencies are properly reflected in gn
• Code follows the style guide
• Test plan is specified in PR before merging

After-merge Checklist:

• The associated issue milestone is set to the smallest version that the
  changes has landed on
• All relevant documentation has been updated, for instance:
  • https://github.com/brave/brave-browser/wiki/Deviations-from-Chromium-(features-we-disable-or-remove)
  • https://github.com/brave/brave-browser/wiki/Proxy-redirected-URLs
  • https://github.com/brave/brave-browser/wiki/Fingerprinting-Protections
  • https://github.com/brave/brave-browser/wiki/Brave%E2%80%99s-Use-of-Referral-Codes
  • https://github.com/brave/brave-browser/wiki/Custom-Headers
  • https://github.com/brave/brave-browser/wiki/Web-Compatibility-Exceptions-in-Brave
  • https://github.com/brave/brave-browser/wiki/QA-Guide
  • https://github.com/brave/brave-browser/wiki/P3A

Test Plan:

There are no steps to replicate it.

[samartnik]

lgtm

[github-actions]

[puLL-Merge] - brave/brave-core@21171

The patch appears to pertain to an Android application, most likely a browser given the chrome in the package names and the word Brave in the class name, which is indicative of Brave Browser, a privacy-centric web browser.

File 1: BraveActivity.java

This file seems to represent an activity class for the Brave browser on Android. The Java activity has been modified as follows:

1. The method initMiscAndroidMetrics() is replaced with initMiscAndroidMetricsFromAWorkerThread(). This new method now calls the original initMiscAndroidMetrics() method from the UI thread. It does this by using the runOnUiThread() method, ensuring that the initMiscAndroidMetrics() method is always run on the UI thread, in line with Android's requirements that UI operations must happen on the main thread.
2. A call to ThreadUtils.assertOnUiThread(); has been added to initMiscAndroidMetrics(), enforcing that the method should only be executed on the UI thread.
3. There is an insertion of a + character in front of every other change, which is common in diff outputs to denote new lines being added.

File 2: MiscAndroidMetricsConnectionErrorHandler.java

This file seems to handle a connection error scenario for some metrics-related functionality—specifically, it seems to reconnect to some service or functionality associated with metrics when a connection fails. The patch includes:

1. Renaming of the delegate method from the default initMiscAndroidMetrics() to initMiscAndroidMetricsFromAWorkerThread(). This ensures that the connection error handler will also use the new method, adhering to the threading model enforced in the BraveActivity.java changes.
2. Minor edits are made to improve the clarity. For instance, there's an extra newline in between method stubs in the delegate interface, making the code easier to read.

Commit Information:

• The commit hash is 556b4e6ca07d74661d154fc49d8a5dfdb6391983, a unique identifier for this set of changes.
• The author of the changes is identified as Serg, with the email serg.zhukovsky@gmail.com.
• The date associated with the changes is November 30, 2023.
• The commit message is Runs initMiscAndroidMetrics from an UI thread in case of connection failure, summarizing the intent of the patch: to ensure metric initialization logic runs on the UI thread after a connection failure.

Overall, this patch modifies the initialization of certain metrics-related functionality so that it always happens on the Android UI thread, which is a common pattern in Android development to avoid threading issues like ANRs (Application Not Responding errors) or crashes due to non-thread-safe operations being performed off the UI thread.

It is important to note that in the context of a diff or patch, lines that start with:

• - indicate the removal of code.
• + indicate the addition of new code.
• Lines without + or - at the beginning indicate context code, which is unchanged in this patch but shown to provide context.