Introduce brave/.clangd config. (#17299)

.clangd

@@ -0,0 +1,18 @@
+# Copyright (c) 2023 The Brave Authors. All rights reserved.
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this file,
+# You can obtain one at https://mozilla.org/MPL/2.0/.
+
+# Enable strict unused includes check.
+If:
+  PathMatch: [.*\.h, .*\.cc, .*\.mm]
+Diagnostics:
+  UnusedIncludes: Strict
+---
+
+# Disable unused const variables warning in headers. Clangd may build .h files
+# directly, which triggers this warning on clang-cl (only on Windows).
+If:
+  PathMatch: .*\.h
+CompileFlags:
+  Add: -Wnounused-const-variable

.gitattributes

@@ -35,12 +35,11 @@
 *.xslt  text eol=lf
 *.xtb   text eol=lf
 
-.clang-format   text eol=lf
-.eslintrc.js   text eol=lf
+.clang*                  text eol=lf
 .git-blame-ignore-revs   text eol=lf
-.gitattributes   text eol=lf
-.gitignore   text eol=lf
-.vpython   text eol=lf
+.gitattributes           text eol=lf
+.gitignore               text eol=lf
+.vpython*                text eol=lf
 
 DEPS   text eol=lf
 LICENSE text eol=lf

chromium_src/tools/clang/pylib/clang/compile_db.py

@@ -8,7 +8,7 @@ import re
 import override_utils
 
 # Remove redirect_cc from the command line.
-GOMACC_PATTERN_TO_REPLACE = ('gomacc(\.exe)', '(gomacc|redirect_cc)(\.exe)')
+GOMACC_PATTERN_TO_REPLACE = (r'gomacc(\.exe)', r'(gomacc|redirect_cc)(\.exe)')
 
 # pylint: disable=used-before-assignment
 assert GOMACC_PATTERN_TO_REPLACE[0] in _GOMA_CMD_LINE_RE.pattern
@@ -19,14 +19,11 @@ _GOMA_CMD_LINE_RE = re.compile(
 @override_utils.override_function(globals())
 def _FilterFlags(original_function, command, additional_filtered_flags):
     flags = original_function(command, additional_filtered_flags)
-    if additional_filtered_flags:
-        # Use --filter_arg to pass brave-specific args to apply here.
-        flags_to_restore = {
-            'brave-keep-bitint256':
-            ' -Xclang -fexperimental-max-bitint-width=256',
-        }
-        for external_flag, flag_to_restore in flags_to_restore.items():
-            if external_flag in additional_filtered_flags:
-                if flag_to_restore in command and flag_to_restore not in flags:
-                    flags += flag_to_restore
+    flags_to_restore = [
+        # Clangd 15+ is required, VSCode extension includes it.
+        ' -Xclang -fexperimental-max-bitint-width=256',
+    ]
+    for flag_to_restore in flags_to_restore:
+        if flag_to_restore in command and flag_to_restore not in flags:
+            flags += flag_to_restore
     return flags