Move -fvisibility-inlines-hidden to the respective compiler config

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")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/toolchain/cc_wrapper.gni")
 import("//build/toolchain/toolchain.gni")
@@ skipping 171 matching lines @@
     ":compiler_codegen",
   ]
 
   # In general, Windows is totally different, but all the other builds share
   # some common GCC configuration.
   if (!is_win) {
     # Common GCC compiler flags setup.
     # --------------------------------
     cflags += [ "-fno-strict-aliasing" ]  # See http://crbug.com/32204
 
-    # Visibility attribute is not supported on AIX.
-    if (current_os != "aix") {
-      cflags_cc += [
-        # Not exporting C++ inline functions can generally be applied anywhere
-        # so we do so here. Normal function visibility is controlled by
-        # //build/config/gcc:symbol_visibility_hidden.
-        "-fvisibility-inlines-hidden",
-      ]
-    }
-
     # Stack protection.
     if (is_mac) {
       # The strong variant of the stack protector significantly increases
       # binary size, so only enable it in debug mode.
       if (is_debug) {
         cflags += [ "-fstack-protector-strong" ]
       } else {
         cflags += [ "-fstack-protector" ]
       }
     } else if (is_posix && !is_chromeos && !is_nacl) {
@@ skipping 1552 matching lines @@
 
 if (is_ios || is_mac) {
   # On Mac and iOS, this enables support for ARC (automatic ref-counting).
   # See http://clang.llvm.org/docs/AutomaticReferenceCounting.html.
   config("enable_arc") {
     common_flags = [ "-fobjc-arc" ]
     cflags_objc = common_flags
     cflags_objcc = common_flags
   }
 }