Introduce skia_pic gyp variable.

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 162 matching lines @@
       }, {
         '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,
       }],
+      [ 'skia_shared_lib or skia_sanitizer or skia_os == "android"', {
+          'skia_pic%' : 1,
+        }, {
+          'skia_pic%' : 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,
     'mips_arch_variant%': 'mips32',
     'mips_dsp%': 0,
     'skia_os%': '<(skia_os)',
@@ skipping 35 matching lines @@
     'skia_moz2d%': 0,
     'skia_crash_handler%':
         '<!(python -c "import os; print os.environ.get(\'CHROME_HEADLESS\', 0)")',
 
     # These are referenced by our .gypi files that list files (e.g. core.gypi)
     #
     'skia_src_path%': '../src',
     'skia_include_path%': '../include',
   },
 }