Roll clang 370156:371202.

Ran `tools/clang/scripts/upload_revision.py 8455294f2ac13d587b13d728038a9bffa7185f2b`.

And remove workarounds that are no longer needed.

TBR=thestig

Bug: 998158,998966,998712
Change-Id: I583aa4acc54ba7e6cc8d2b36f332070761418203
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1789662
Commit-Queue: Nico Weber <thakis@chromium.org>
Reviewed-by: Hans Wennborg <hans@chromium.org>
Cr-Commit-Position: refs/heads/master@{#694450}

build/config/compiler/BUILD.gn

@@ -1515,26 +1515,22 @@ config("default_warnings") {
 
           # TODO(https://crbug.com/995200): Clean up and enable.
           "-Wno-xor-used-as-pow",
+
+          # TODO(https://crbug.com/999871): Decide if we want to clean up the
+          # codebase or just disable this.  Doesn't seem super useful, but
+          # also fires in only 4 files.
+          "-Wno-c99-designator",
+
+          # This is a side effect of -Wc99-designator; easier to clean up.
+          "-Wno-reorder-init-list",
+
+          # TODO(https://crbug.com/999886): Clean up, enable.
+          "-Wno-final-dtor-non-final-class",
         ]
         cflags_c += [
           # TODO(https://crbug.com/995993): Clean up and enable.
           "-Wno-implicit-fallthrough",
         ]
-
-        if (llvm_force_head_revision) {
-          cflags += [
-            # TODO(https://crbug.com/999871): Decide if we want to clean up the
-            # codebase or just disable this.  Doesn't seem super useful, but
-            # also fires in only 4 files.
-            "-Wno-c99-designator",
-
-            # This is a side effect of -Wc99-designator; easier to clean up.
-            "-Wno-reorder-init-list",
-
-            # TODO(https://crbug.com/999886): Clean up, enable.
-            "-Wno-final-dtor-non-final-class",
-          ]
-        }
       }
     }
   }

build/partitioned_shared_library.gni

@@ -65,10 +65,6 @@ template("partitioned_shared_library") {
       "--link-only",
     ]
 
-    # https://crbug.com/1000665: Force partitions to be aligned. This can be
-    # removed once LLVM rolls in an alignment fix.
-    ldflags += [ "-Wl,-z,separate-code" ]
-
     # This shared library is an intermediate artifact that should not packaged
     # into the final build. Therefore, reset metadata.
     metadata = {

chromeos/printing/ppd_line_reader.cc

@@ -108,9 +108,7 @@ class PpdLineReaderImpl : public PpdLineReader {
 
   // Skip input until we hit a newline (which is discarded).  If
   // we encounter eof before a newline, false is returned.
-  // TODO(thakis): Remove NOINLINE once the msan fix for
-  // https://crbug.com/998966 is rolled in.
-  bool SkipToNextLine() NOINLINE {
+  bool SkipToNextLine() {
     while (true) {
       char c = NextChar();
       if (Eof()) {

tools/clang/scripts/update.py

@@ -37,8 +37,8 @@
 # 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 = '6964027315f70c6817217d8dba0368fd3a274ba3'
-CLANG_SVN_REVISION = '370156'
+CLANG_REVISION = '8455294f2ac13d587b13d728038a9bffa7185f2b'
+CLANG_SVN_REVISION = '371202'
 CLANG_SUB_REVISION = 1
 
 PACKAGE_VERSION = '%s-%s-%s' % (CLANG_SVN_REVISION, CLANG_REVISION[:8],