Add sk_careful_memcpy to catch undefined behavior in memcpy.

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 418 matching lines @@
           [ 'skia_shared_lib', {
             'defines': [
               'SKIA_DLL',
               'SKIA_IMPLEMENTATION=1',
             ],
           }],
           # Enable asan, tsan, etc.
           [ 'skia_sanitizer', {
             'cflags': [
               '-fsanitize=<(skia_sanitizer)',
+              '-fno-sanitize-recover=<(skia_sanitizer)',
             ],
             'ldflags': [
               '-fsanitize=<(skia_sanitizer)',
             ],
             'conditions' : [
               [ 'skia_sanitizer == "thread"', {
                 'defines': [ 'THREAD_SANITIZER' ],
               }],
               [ 'skia_sanitizer == "undefined"', {
                 'cflags_cc!': ['-fno-rtti'],
@@ skipping 197 matching lines @@
           'LD_RUNPATH_SEARCH_PATHS': ['@executable_path/.'],
       },
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }