Introduce skia_pic gyp variable.

gyp/common_conditions.gypi

 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
     'SK_SUPPORT_GPU=<(skia_gpu)',
     'SK_SUPPORT_OPENCL=<(skia_opencl)',
     'SK_FORCE_DISTANCEFIELD_FONTS=<(skia_force_distancefield_fonts)',
   ],
   'conditions' : [
+    ['skia_pic', {
+     'cflags': [
+       '-fPIC',
+     ],
+     'conditions' : [
+      # FIXME: The reason we don't do this on Android is due to the way
+      # we build the executables/skia_launcher on Android. See
+      # https://codereview.chromium.org/406613003/diff/1/gyp/common_conditions.gypi#newcode455
+      ['skia_os != "android"', {
+       'target_conditions': [
+         [ '_type == "executable"', {
+           'cflags': [ '-fPIE' ],
+           'ldflags': [ '-pie' ],
+         }],
+       ],
+      }],
+     ],
+    }],
     [ 'skia_arch_type == "arm64"', {
       'cflags': [
         '-ffp-contract=off',
       ],
     }],
 
     # As of M35, Chrome requires SSE2 on x86 (and SSSE3 on Mac).
     [ 'skia_arch_type == "x86"', {
       'cflags': [
         '-msse2',
@@ skipping 375 matching lines @@
           },
           'Release': {
             'cflags': [
               '-O<(skia_release_optimization_level)',
             ],
             'defines': [ 'NDEBUG' ],
           },
         },
         'conditions' : [
           [ 'skia_shared_lib', {
-            'cflags': [
-              '-fPIC',
-            ],
             'defines': [
               'SKIA_DLL',
               'SKIA_IMPLEMENTATION=1',
             ],
           }],
           [ 'skia_os == "nacl"', {
             'defines': [
               'SK_BUILD_FOR_NACL',
             ],
             'variables': {
@@ skipping 23 matching lines @@
           [ 'skia_sanitizer', {
             'cflags': [
               '-fsanitize=<(skia_sanitizer)',
             ],
             'ldflags': [
               '-fsanitize=<(skia_sanitizer)',
             ],
             'conditions' : [
               [ 'skia_sanitizer == "thread"', {
                 'defines': [ 'SK_DYNAMIC_ANNOTATIONS_ENABLED=1' ],
-                'cflags': [ '-fPIC' ],
-                'target_conditions': [
-                  [ '_type == "executable"', {
-                    'cflags': [ '-fPIE' ],
-                    'ldflags': [ '-pie' ],
-                  }],
-                ],
               }],
               [ 'skia_sanitizer == "undefined"', {
-                'cflags': [ '-fPIC' ],
                 'cflags_cc!': ['-fno-rtti'],
-                'target_conditions': [
-                  [ '_type == "executable"', {
-                    'cflags': [ '-fPIE' ],
-                    'ldflags': [ '-pie' ],
-                  }],
-                ],
               }],
             ],
           }],
           [ 'skia_clang_build', {
             'cflags_cc': [
                 # Build in C++11 mode to make sure we'll have an easy time switching.
                 '-std=c++11',
                 '-Wno-unknown-warning-option',  # Allows unknown warnings.
                 '-Wno-deprecated',              # From Qt, via debugger (older Clang).
                 '-Wno-deprecated-register',     # From Qt, via debugger (newer Clang).
@@ skipping 178 matching lines @@
           [ 'skia_android_framework', {
             'libraries!': [
               '-lstdc++',
               '-lm',
             ],
             'cflags!': [
               '-fuse-ld=gold',
             ],
           }],
           [ 'skia_shared_lib', {
-            'cflags': [
-              '-fPIC',
-            ],
             'defines': [
               'SKIA_DLL',
               'SKIA_IMPLEMENTATION=1',
               # Needed until we fix skbug.com/2440.
               'SK_SUPPORT_LEGACY_CLIPTOLAYERFLAG',
             ],
           }],
           [ 'skia_profile_enabled == 1', {
             'cflags': ['-g', '-fno-omit-frame-pointer', '-marm', '-mapcs'],
           }],
@@ skipping 18 matching lines @@
     [ 'skia_crash_handler', {
       'defines': [ 'SK_CRASH_HANDLER' ],
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }