Rename classes in components/blacklist to use more inclusive names.

This is the first of 2 changes to rename components/blacklist to
components/blocklist. This contains all the class/method/member/variable
renaming. There should be no functional differences here. This patch
will be followed by another patch that renames the directory/files and
updates the necessary build system rules. The vast majority of the
changes here are simply replacing an 'a' with an 'o'.

- Replaced blacklist references with blocklist in components/blacklist
- Replaced whitelist references with allowlist in components/blacklist
- Updated all code that depends on components/blacklist to use new
  names and updated the names of any callers that may have been
  influenced by the original names.
- Filed bugs and left TODOs for code that interacts with backend
  services that may depend on the old name.
- Replaced some empty method bodies with '= default;' and added
  default member assignments to make ClangTidy happy. These
  should not cause any behavior changes.

Bug: 1092096
Change-Id: I8a1a7d7bb51c619f05476086755509c94e05f995
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2234793
Reviewed-by: Daniel Cheng <[email protected]>
Reviewed-by: Joshua Bell <[email protected]>
Reviewed-by: Charlie Harrison <[email protected]>
Reviewed-by: Michael Crouse <[email protected]>
Commit-Queue: Charlie Harrison <[email protected]>
Auto-Submit: Aaron Colwell <[email protected]>
Cr-Commit-Position: refs/heads/master@{#776139}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 26072cc6..754fb67 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1138,8 +1138,8 @@
     "Overrides the built-in software rendering list and enables "
     "GPU-acceleration on unsupported system configurations.";
 
-const char kIgnorePreviewsBlacklistName[] = "Ignore Previews Blocklist";
-const char kIgnorePreviewsBlacklistDescription[] =
+const char kIgnorePreviewsBlocklistName[] = "Ignore Previews Blocklist";
+const char kIgnorePreviewsBlocklistDescription[] =
     "Ignore decisions made by the PreviewsBlockList";
 
 const char kImprovedCookieControlsName[] =