Factor out skia_keep_frame_pointer. Handy with perf to get call stacks.

gyp/common_variables.gypi

 # Copyright 2012 The Android Open Source Project
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   # Get ready for the ugly...
   #
   # - We have to nest our variables dictionaries multiple levels deep, so that
   #   this and other gyp files can rely on previously-set variable values in
@@ skipping 102 matching lines @@
       # by the compiler.  The user should be aware that this has different
       # meanings for different compilers and should exercise caution when
       # overriding it.
       [ 'skia_os == "win"', {
         'skia_release_optimization_level%': '<(skia_default_vs_optimization_level)',
       }, {
         'skia_release_optimization_level%': '<(skia_default_gcc_optimization_level)',
       }],
       [ 'skia_sanitizer', {
         'skia_clang_build': 1,
+        'skia_keep_frame_pointer': 1,
       }, {
         'skia_clang_build%': 0,
+        'skia_keep_frame_pointer%': 0,
       }],
     ],
 
     # Re-define all variables defined within the level-2 'variables' dict,
     # so that siblings of the level-1 'variables' dict can see them.
     'arm_version%': '<(arm_version)',
     'arm_neon%': '<(arm_neon)',
     'arm_neon_optional%': 0,
     'skia_os%': '<(skia_os)',
     'os_posix%': '<(os_posix)',
@@ skipping 22 matching lines @@
     #
     'skia_src_path%': '../src',
     'skia_include_path%': '../include',
   },
 }
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 # tab-width:2
 # indent-tabs-mode:nil
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