remove arm_version==5 configuration, since it's no longer supported

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 1824 matching lines @@
         # Keep the code under #ifndef NVALGRIND.
         'release_valgrind_build': 1,
       }],
 
       # Enable RLZ on Win, Mac, iOS and ChromeOS.
       ['branding=="Chrome" and (OS=="win" or OS=="mac" or OS=="ios" or chromeos==1)', {
         'enable_rlz%': 1,
       }],
 
       # Set default compiler flags depending on ARM version.
-      ['arm_version==5 and android_webview_build==0', {
-        # Flags suitable for Android emulator
-        'arm_arch%': 'armv5te',
-        'arm_tune%': 'xscale',
-        'arm_fpu%': '',
-        'arm_float_abi%': 'soft',
-        'arm_thumb%': 0,
-      }],
       ['arm_version==6 and android_webview_build==0', {
         'arm_arch%': 'armv6',
         'arm_tune%': '',
         'arm_fpu%': '',
         'arm_float_abi%': 'soft',
         'arm_thumb%': 0,
       }],
       ['arm_version==7 and android_webview_build==0', {
         'arm_arch%': 'armv7-a',
         'arm_tune%': 'cortex-a8',
@@ skipping 2942 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',
   },
 }