Roll clang n341867-c2900381-1 : n343707-61f538d3-1.

Ran `tools/clang/scripts/upload_revision.py 61f538d37b80eb589f8990f0b4513d702704ea38`.

Bug: 1051578
Cq-Include-Trybots: chromium/try:mac_chromium_asan_rel_ng
Cq-Include-Trybots: chromium/try:linux_chromium_cfi_rel_ng
Cq-Include-Trybots: chromium/try:linux_chromium_msan_rel_ng
Cq-Include-Trybots: chromium/try:linux_chromium_chromeos_msan_rel_ng
Cq-Include-Trybots: chromium/try:linux-chromeos-dbg,win-asan
Cq-Include-Trybots: chromium/try:chromeos-amd64-generic-cfi-thin-lto-rel
Cq-Include-Trybots: chromium/try:linux_chromium_compile_dbg_32_ng
Cq-Include-Trybots: chromium/try:win7-rel,win-angle-deqp-rel-32
Cq-Include-Trybots: chromium/try:win-angle-deqp-rel-64
Cq-Include-Trybots: chromium/try:dawn-win10-x86-deps-rel
Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Change-Id: Ibc750b521a92fe46f5298983d384f0f9670159b4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2074698Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744792}

build/config/compiler/BUILD.gn

@@ -1525,6 +1525,9 @@ config("default_warnings") {
 
           # TODO(https://crbug.com/1039697): Evaluate and possibly enable.
           "-Wno-range-loop-analysis",
+
+          # TODO(https://crbug.com/1050281): Clean up, enable.
+          "-Wno-non-c-typedef-for-linkage",
         ]
 
         if (is_android) {
@@ -1534,24 +1537,15 @@ config("default_warnings") {
           ]
         }
 
-        if (llvm_force_head_revision) {
-          cflags += [
-            # TODO(https://crbug.com/1050281): Clean up, enable.
-            "-Wno-non-c-typedef-for-linkage",
-          ]
-
-          cflags_c += [
-            # TODO(https://crbug.com/1054220): This used to be a C++-only
-            # warning, but it was extended to .C files as well, where it
-            # caught a cast of pointer to long in third-party that isn't
-            # valid on Windows, which is LLP64.
-            "-Wno-microsoft-cast",
-          ]
-        }
-
         cflags_c += [
           # TODO(https://crbug.com/995993): Clean up and enable.
           "-Wno-implicit-fallthrough",
+
+          # TODO(https://crbug.com/1054220): This used to be a C++-only
+          # warning, but it was extended to .C files as well, where it
+          # caught a cast of pointer to long in third-party that isn't
+          # valid on Windows, which is LLP64.
+          "-Wno-microsoft-cast",
         ]
       }
     }

tools/clang/scripts/update.py

@@ -39,8 +39,8 @@ import zipfile
 # Do NOT CHANGE this if you don't know what you're doing -- see
 # https://chromium.googlesource.com/chromium/src/+/master/docs/updating_clang.md
 # Reverting problematic clang rolls is safe, though.
-CLANG_REVISION = 'c29003813ab9bd6ea7b6de40ea8f1fe21979f13f'
-CLANG_SVN_REVISION = 'n341867'
+CLANG_REVISION = '61f538d37b80eb589f8990f0b4513d702704ea38'
+CLANG_SVN_REVISION = 'n343707'
 CLANG_SUB_REVISION = 1
 
 PACKAGE_VERSION = '%s-%s-%s' % (CLANG_SVN_REVISION, CLANG_REVISION[:8],