Roll clang n359864-04b9a46c-1 : n361601-7e8d5a90-1.

This also updates the Clang version to 12.0.0.

Ran `tools/clang/scripts/upload_revision.py 7e8d5a90f2c101388d3b0bbce8555e871c670232`.

Bug: 1107461
Binary-Size: Being investigated async in crbug.com/1110413
Change-Id: Ie0dac66069bec3cf10bfe355b5044ebc7af22d88
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_chromeos_asan_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:linux_angle_deqp_rel_ng
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:iphone-device,ipad-device
Cq-Include-Trybots: chrome/try:linux-chromeos-chrome
Cq-Include-Trybots: chrome/try:win-chrome,win64-chrome,mac-chrome
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2320674
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792790}
GitOrigin-RevId: f7438c7b9f006e1119986d52bf0f2110167dec59

config/compiler/BUILD.gn

@@ -1062,14 +1062,6 @@ config("compiler_codegen") {
     ldflags += [ "-Wl,-mllvm,-enable-machine-outliner=never" ]
   }
 
-  if (is_clang && !is_nacl && !use_xcode_clang && !is_chromeos_device) {
-    cflags += [
-      # TODO(thakis): Remove after next clang roll, see reviews.llvm.org/D82998
-      "-mllvm",
-      "-basic-aa-recphi=0",
-    ]
-  }
-
   # TODO(thakis): Remove `if (!is_win)` after next clang roll.
   if (!is_win) {
     asmflags = cflags

toolchain/toolchain.gni

@@ -39,12 +39,7 @@ if (generate_linker_map) {
 
 declare_args() {
   # Clang compiler version. Clang files are placed at version-dependent paths.
-  if (llvm_force_head_revision) {
-    clang_version = "12.0.0"
-  } else {
-    # TODO(crbug.com/1105518): Remove in the next Clang roll.
-    clang_version = "11.0.0"
-  }
+  clang_version = "12.0.0"
 }
 
 # Check target_os here instead of is_ios as this file is loaded for secondary