Roll DEPS for clang to 63ca7c81.

build_overrides/build.gni

Index: build_overrides/build.gni
diff --git a/build_overrides/build.gni b/build_overrides/build.gni
index ccc838f31309dde90fd3995fea8c9d86d4a40fa0..a9e8000a859329c0c1bb088e214342cca91c599f 100644
--- a/build_overrides/build.gni
+++ b/build_overrides/build.gni
@@ -16,8 +16,8 @@ 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
@@ -34,3 +34,10 @@ linux_use_bundled_binutils_override = false
 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
+}