Streamline Thumb config.

gyp/common_conditions.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
@@ skipping 247 matching lines @@
           }],
           # For profiling; reveals some costs, exaggerates others (e.g. trivial setters & getters).
           [ 'skia_disable_inlining', {
             'cflags': [
               '-fno-inline',
               '-fno-default-inline',
               '-finline-limit=0',
               '-fno-omit-frame-pointer',
             ],
           }],
-          [ 'skia_arch_type == "arm" and arm_thumb == 1', {
-            'cflags': [
-              '-mthumb',
-            ],
-            # The --fix-cortex-a8 switch enables a link-time workaround for
-            # an erratum in certain Cortex-A8 processors.  The workaround is
-            # enabled by default if you target the ARM v7-A arch profile.
-            # It can be enabled otherwise by specifying --fix-cortex-a8, or
-            # disabled unconditionally by specifying --no-fix-cortex-a8.
-            #
-            # The erratum only affects Thumb-2 code.
-            'conditions': [
-              [ 'arm_version < 7', {
-                'ldflags': [
-                  '-Wl,--fix-cortex-a8',
-                ],
-              }],
-            ],
-          }],
           [ 'skia_arch_type == "arm" and arm_version >= 7', {
             'cflags': [
               '-march=armv7-a',
+              '-mthumb',
             ],
             'ldflags': [
               '-march=armv7-a',
             ],
             'conditions': [
               [ 'arm_neon == 1', {
                 'defines': [
                   'SK_ARM_HAS_NEON',
                 ],
                 'cflags': [
@@ skipping 365 matching lines @@
         # add flags here (e.g. SK_SUPPORT_LEGACY_...) needed by moz2d
       ],
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }