[PM] Lift the //chrome/browser include restrictions.

These restrictions are not necessary now that most stuff have been moved
to //components/performance_manager.

Change-Id: I84a93c998e77ef5da01b0b7264f83c5432dba030
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1947480
Auto-Submit: Sébastien Marchand <sebmarchand@chromium.org>
Commit-Queue: Chris Hamilton <chrisha@chromium.org>
Reviewed-by: Chris Hamilton <chrisha@chromium.org>
Cr-Commit-Position: refs/heads/master@{#721137}

chrome/browser/performance_manager/DEPS

-# Prevent the include of Chrome specific files in general.
 include_rules = [
-  "-chrome/browser",
-  "+chrome/browser/performance_manager",
   "+components/performance_manager",
-]
-
-# Allow some Chrome specific files to includes more things from //chrome.
-specific_include_rules = {
-  "chrome.*": [
-    "+chrome/browser",
-  ],
-}
+]
\ No newline at end of file