Update from https://crrev.com/306655

build/config/android/config.gni

 # Copyright 2014 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.
 
 # This file contains common system config stuff for the Android build.
 
 if (is_android) {
-  has_chrome_android_internal = exec_script("//build/dir_exists.py",
-          [ rebase_path("//clank", root_build_dir) ],
-          "string") == "True"
+  has_chrome_android_internal =
+      exec_script("//build/dir_exists.py",
+                  [ rebase_path("//clank", root_build_dir) ],
+                  "string") == "True"
 
   if (has_chrome_android_internal) {
     import("//clank/config.gni")
   } else {
     default_android_sdk_root = "//third_party/android_tools/sdk"
     default_android_sdk_version = "21"
     default_android_sdk_build_tools_version = "21.0.1"
   }
 
   declare_args() {
     android_sdk_root = default_android_sdk_root
     android_sdk_version = default_android_sdk_version
     android_sdk_build_tools_version = default_android_sdk_build_tools_version
 
     # This is set when building the Android WebView inside the Android build
     # system, using the 'android' gyp backend. The WebView code is still built
     # when this is unset, but builds using the normal chromium build system.
     is_android_webview_build = false
 
-    android_default_keystore_path = "//build/android/ant/chromium-debug.keystore"
+    android_default_keystore_path =
+        "//build/android/ant/chromium-debug.keystore"
     android_default_keystore_name = "chromiumdebugkey"
     android_default_keystore_password = "chromium"
 
     # This is a unique identifier for a given build. It's used for
     # identifying various build artifacts corresponding to a particular build of
     # chrome (e.g. where to find archived symbols).
     android_chrome_build_id = "\"\""
   }
 
-  # ABI ------------------------------------------------------------------------
-
-  if (cpu_arch == "x86") {
-    android_app_abi = "x86"
-  } else if (cpu_arch == "arm") {
-    import("//build/config/arm.gni")
-    if (arm_version < 7) {
-      android_app_abi = "armeabi"
-    } else {
-      android_app_abi = "armeabi-v7a"
-    }
-  } else if (cpu_arch == "mipsel") {
-    android_app_abi = "mips"
-  } else {
-    assert(false, "Unknown Android ABI: " + cpu_arch)
-  }
-
   # Host stuff -----------------------------------------------------------------
 
   # Defines the name the Android build gives to the current host CPU
   # architecture, which is different than the names GN uses.
   if (build_cpu_arch == "x64") {
     android_host_arch = "x86_64"
   } else if (build_cpu_arch == "x86") {
     android_host_arch = "x86"
   } else {
     assert(false, "Need Android toolchain support for your build CPU arch.")
@@ skipping 15 matching lines @@
 
   android_sdk = "${android_sdk_root}/platforms/android-${android_sdk_version}"
 
   # Path to the Android NDK and SDK.
   android_ndk_root = "//third_party/android_tools/ndk"
   android_ndk_include_dir = "$android_ndk_root/usr/include"
 
   android_sdk = "${android_sdk_root}/platforms/android-${android_sdk_version}"
 
   android_sdk_tools = "${android_sdk_root}/tools"
-  android_sdk_build_tools = "${android_sdk_root}/build-tools/$android_sdk_build_tools_version"
+  android_sdk_build_tools =
+      "${android_sdk_root}/build-tools/$android_sdk_build_tools_version"
 
   # Path to the SDK's android.jar
   android_sdk_jar = "$android_sdk/android.jar"
 
   zipalign_path = "$android_sdk_build_tools/zipalign"
 
   # Subdirectories inside android_ndk_root that contain the sysroot for the
   # associated platform.
   _android_api_level = 14
-  x86_android_sysroot_subdir = "platforms/android-${_android_api_level}/arch-x86"
-  arm_android_sysroot_subdir = "platforms/android-${_android_api_level}/arch-arm"
-  mips_android_sysroot_subdir = "platforms/android-${_android_api_level}/arch-mips"
+  x86_android_sysroot_subdir =
+      "platforms/android-${_android_api_level}/arch-x86"
+  arm_android_sysroot_subdir =
+      "platforms/android-${_android_api_level}/arch-arm"
+  mips_android_sysroot_subdir =
+      "platforms/android-${_android_api_level}/arch-mips"
 
   # Toolchain root directory for each build. The actual binaries are inside
   # a "bin" directory inside of these.
   _android_toolchain_version = "4.9"
-  x86_android_toolchain_root = "$android_ndk_root/toolchains/x86-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
-  arm_android_toolchain_root = "$android_ndk_root/toolchains/arm-linux-androideabi-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
-  mips_android_toolchain_root = "$android_ndk_root/toolchains/mipsel-linux-android-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
+  x86_android_toolchain_root =
+      "$android_ndk_root/toolchains/x86-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
+  arm_android_toolchain_root =
+      "$android_ndk_root/toolchains/arm-linux-androideabi-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
+  mips_android_toolchain_root =
+      "$android_ndk_root/toolchains/mipsel-linux-android-${_android_toolchain_version}/prebuilt/${android_host_os}-${android_host_arch}"
 
   # Location of libgcc. This is only needed for the current GN toolchain, so we
   # only need to define the current one, rather than one for every platform
   # like the toolchain roots.
   if (cpu_arch == "x86") {
     android_prebuilt_arch = "android-x86"
     _binary_prefix = "i686-linux-android"
     android_toolchain_root = "$x86_android_toolchain_root"
     android_libgcc_file =
-      "$android_toolchain_root/lib/gcc/i686-linux-android/${_android_toolchain_version}/libgcc.a"
+        "$android_toolchain_root/lib/gcc/i686-linux-android/${_android_toolchain_version}/libgcc.a"
   } else if (cpu_arch == "arm") {
     android_prebuilt_arch = "android-arm"
     _binary_prefix = "arm-linux-androideabi"
     android_toolchain_root = "$arm_android_toolchain_root"
-    if (arm_use_thumb) {
-      android_libgcc_file =
-        "$android_toolchain_root/lib/gcc/arm-linux-androideabi/${_android_toolchain_version}/thumb/libgcc.a"
-    } else {
-      android_libgcc_file =
+    android_libgcc_file =
         "$android_toolchain_root/lib/gcc/arm-linux-androideabi/${_android_toolchain_version}/libgcc.a"
-    }
   } else if (cpu_arch == "mipsel") {
     android_prebuilt_arch = "android-mips"
     _binary_prefix = "mipsel-linux-android"
     android_toolchain_root = "$mips_android_toolchain_root"
     android_libgcc_file =
-      "$android_toolchain_root/lib/gcc/mipsel-linux-android/${_android_toolchain_version}/libgcc.a"
+        "$android_toolchain_root/lib/gcc/mipsel-linux-android/${_android_toolchain_version}/libgcc.a"
   } else {
     assert(false, "Need android libgcc support for your target arch.")
   }
 
   android_tool_prefix = "$android_toolchain_root/bin/$_binary_prefix-"
   android_readelf = "${android_tool_prefix}readelf"
   android_objcopy = "${android_tool_prefix}objcopy"
-  android_gdbserver = "$android_ndk_root/prebuilt/$android_prebuilt_arch/gdbserver/gdbserver"
+  android_gdbserver =
+      "$android_ndk_root/prebuilt/$android_prebuilt_arch/gdbserver/gdbserver"
 
   # stlport stuff --------------------------------------------------------------
 
   if (component_mode == "shared_library") {
     android_stlport_library = "stlport_shared"
   } else {
     android_stlport_library = "stlport_static"
   }
+
+  # ABI ------------------------------------------------------------------------
+
+  if (cpu_arch == "x86") {
+    android_app_abi = "x86"
+  } else if (cpu_arch == "arm") {
+    import("//build/config/arm.gni")
+    if (arm_version < 7) {
+      android_app_abi = "armeabi"
+    } else {
+      android_app_abi = "armeabi-v7a"
+    }
+  } else if (cpu_arch == "mipsel") {
+    android_app_abi = "mips"
+  } else {
+    assert(false, "Unknown Android ABI: " + cpu_arch)
+  }
 } else {
   if (!defined(is_android_webview_build)) {
     is_android_webview_build = false
   }
 }