Update build.gni to match chromium/src/build

build.gni

Index: build.gni
diff --git a/build.gni b/build.gni
index 68be7a2fdd21173e0561c0042b398ed947abad10..541c474ed31337b72b2f3b02e6781a8389004ea8 100644
--- a/build.gni
+++ b/build.gni
@@ -2,13 +2,12 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+# Several dependencies of Chrome require a different min sdk and/or deployment
+# target when built as stand-alone projects. If this is ever not the case, these
+# variables can be removed.
 # See https://bugs.chromium.org/p/webrtc/issues/detail?id=5453.
-# Some WebRTC targets require the 10.7 deployment version of the Mac SDK
-# and a 10.11 min SDK, but those targets are only used in non-Chromium
-# builds. We can remove this when Chromium drops 10.6 support and also
-# requires 10.7.
 mac_sdk_min_build_override = "10.10"
-mac_deployment_target_build_override = "10.7"
+mac_deployment_target_build_override = "10.8"
 
 # Variable that can be used to support multiple build scenarios, like having
 # Chromium specific targets in a client project's GN file etc.
@@ -32,3 +31,10 @@ tsan_suppressions_file = "//build/sanitizers/tsan_suppressions.cc"
 
 # Uncomment these to specify a different lint suppressions file for android
 # lint_suppressions_file = path/to/your/suppressions/file/suppressions.xml
+
+declare_args() {
+  # Android 32-bit non-component, non-clang builds cannot have symbol_level=2
+  # due to 4GiB file size limit, see https://crbug.com/648948.
+  # Set this flag to true to skip the assertion.
+  ignore_elf32_limitations = false
+}