Revert "Roll Clang 233105-2:237739-1"

build/config/compiler/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/config/android/config.gni")
 import("//build/config/chrome_build.gni")
 if (current_cpu == "arm") {
   import("//build/config/arm.gni")
 }
 if (current_cpu == "mipsel" || current_cpu == "mips64el") {
@@ skipping 359 matching lines @@
     # for these builds.
     if (is_chrome_branded && is_official_build) {
       cflags += [
         "-fno-unwind-tables",
         "-fno-asynchronous-unwind-tables",
       ]
       defines += [ "NO_UNWIND_TABLES" ]
     } else {
       cflags += [ "-funwind-tables" ]
     }
-
-    if (is_clang && !is_nacl && !is_debug) {
-      # Non-unique section names appears to make linker dead stripping
-      # less effective. See http://crbug.com/483026#c20
-      # TODO(hans): Remove this if resolved upstream.
-      cflags += [ "-funique-section-names" ]
-    }
   }
 
   # Linux/Android common flags setup.
   # ---------------------------------
   if (is_linux || is_android) {
     cflags += [
       "-fPIC",
       "-pipe",  # Use pipes for communicating between sub-processes. Faster.
     ]
 
@@ skipping 747 matching lines @@
       cflags += [ "-gsplit-dwarf" ]
     }
   }
 }
 
 config("no_symbols") {
   if (!is_win) {
     cflags = [ "-g0" ]
   }
 }