Roll Clang 342523:343342

Bug: 888476
Change-Id: I2d95b71010226218631dab88b536fb00669db190
Reviewed-on: https://chromium-review.googlesource.com/1251466
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#595334}

build/config/compiler/BUILD.gn

@@ -1501,10 +1501,7 @@ config("default_warnings") {
           # Ignore warnings about MSVC optimization pragmas.
           # TODO(thakis): Only for no_chromium_code? http://crbug.com/505314
           "-Wno-ignored-pragma-optimize",
-        ]
-      }
-      if (llvm_force_head_revision) {
-        cflags += [
+
           # TODO(hans): https://crbug.com/890307
           "-Wno-defaulted-function-deleted",
         ]

tools/clang/scripts/update.py

@@ -27,7 +27,7 @@ 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 = '342523'
+CLANG_REVISION = '343342'
 
 use_head_revision = bool(os.environ.get('LLVM_FORCE_HEAD_REVISION', '0')
                          in ('1', 'YES'))