Roll DEPS for clang to 63ca7c81.

build_overrides/build.gni

 # Copyright 2016 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.
 
 # 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"
 
 # Variable that can be used to support multiple build scenarios, like having
 # Chromium specific targets in a client project's GN file etc.
 build_with_chromium = true
 
 # Support different NDK locations in non-Chromium builds.
 default_android_ndk_root = "//third_party/android_ndk"
-default_android_ndk_version = "r11c"
-default_android_ndk_major_version = "11"
+default_android_ndk_version = "r12b"
+default_android_ndk_major_version = "12"
 
 # PDFium builds don't support building java targets.
 enable_java_templates = false
 
 # Whether to use the neon FPU instruction set or not.
 if (current_cpu == "arm") {
   arm_use_neon = true
 }
 
 # PDFium builds don't use Chromium's third_party/binutils.
 linux_use_bundled_binutils_override = false
 
 # PDFium just uses the Chromium suppression files for now.
 asan_suppressions_file = "//build/sanitizers/asan_suppressions.cc"
 lsan_suppressions_file = "//build/sanitizers/lsan_suppressions.cc"
 tsan_suppressions_file = "//build/sanitizers/tsan_suppressions.cc"
+
+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
+}