Use NDK r8b and 64-bit toolchain

build/common.gypi

 # Copyright (c) 2012 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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 2231 matching lines @@
                     # uses by default when building for arm, reference for which
                     # can be found in the following file in the Android NDK:
                     # toolchains/arm-linux-androideabi-4.4.3/setup.mk
                     'cflags': [
                       # The tree-sra optimization (scalar replacement for
                       # aggregates enabling subsequent optimizations) leads to
                       # invalid code generation when using the Android NDK's
                       # compiler (r5-r7). This can be verified using
                       # TestWebKitAPI's WTF.Checked_int8_t test.
                       '-fno-tree-sra',
+                      '-fuse-ld=gold',
                       '-Wno-psabi',
                     ],
                     # Android now supports .relro sections properly.
                     # NOTE: While these flags enable the generation of .relro
                     # sections, the generated libraries can still be loaded on
                     # older Android platform versions.
                     'ldflags': [
                         '-Wl,-z,relro',
                         '-Wl,-z,now',
+                        '-fuse-ld=gold',
                     ],
                     'conditions': [
                       ['arm_thumb == 1', {
                         # Android toolchain doesn't support -mimplicit-it=thumb
                         'cflags!': [ '-Wa,-mimplicit-it=thumb', ],
                         'cflags': [ '-mthumb-interwork', ],
                       }],
                       ['armv7==0', {
                         # Flags suitable for Android emulator
                         'cflags': [
                           '-march=armv5te',
                           '-mtune=xscale',
                           '-msoft-float',
                         ],
                         'defines': [
                           '__ARM_ARCH_5__',
                           '__ARM_ARCH_5T__',
                           '__ARM_ARCH_5E__',
                           '__ARM_ARCH_5TE__',
                         ],
                       }],
                       ['clang==1', {
                         'cflags!': [
                           # Clang does not support the following options.
                           '-mthumb-interwork',
                           '-finline-limit=64',
                           '-fno-tree-sra',
+                          '-fuse-ld=gold',
                           '-Wno-psabi',
                         ],
                       }],
                     ],
                   }],
                 ],
               }],
             ],
           }],
           ['linux_fpic==1', {
@@ skipping 1095 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }