Migrate ChromeLocationBarModelDelegateTest to a browser test

This patch migrates ChromeLocationBarModelDelegateTest from a unit test
that uses the deprecated `BrowserWithTestWindowTest` fixture to a proper
browser test that inherits from `InProcessBrowserTest`.

The following changes were made:
- The test fixture now inherits from `InProcessBrowserTest`.
- `SetUp()` was renamed to `SetUpOnMainThread()` and the base class
  method is now called correctly.
- `profile()` calls were replaced with `browser()->profile()`.
- `TEST_F` macros were replaced with `IN_PROC_BROWSER_TEST_F`.
- The `GetTestingFactories()` override was removed as it is no longer
  needed with the full browser environment provided by
  `InProcessBrowserTest`.
- Unnecessary headers for the old test fixture were removed and new
  ones for browser tests were added.

This is a pure refactoring with no change to the test logic.

Change-Id: If6f255837bf1681c4f44e4fd1dbadc918a47350e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6641923
Commit-Queue: Dominik Klemba <tacet@google.com>
Reviewed-by: Tom Lukaszewicz <tluk@chromium.org>
Reviewed-by: Keren Zhu <kerenzhu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1474128}