clang/win: Build chromium code without -Wno-incompatible-pointer-types.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 4aea53222a54b1bbfe15f2a4c8cccbfc19a5e24c..3bc906fcc474dd8b302837827a014fdfabac2fb1 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -3087,6 +3087,11 @@
         'variables': { 'clang_warning_flags': ['-Wexit-time-destructors']},
       }],
       ['chromium_code==0', {
+        'variables': {
+          'clang_warning_flags': [
+            '-Wno-incompatible-pointer-types',
+          ]
+        },
         'conditions': [
           [ 'os_posix==1 and OS!="mac" and OS!="ios"', {
             # We don't want to get warnings from third-party code,
@@ -5703,7 +5708,6 @@
                   '-Wno-empty-body',  # http://crbug.com/504661
                   '-Wno-extra-tokens',  # http://crbug.com/504663
                   '-Wno-ignored-attributes',  # http://crbug.com/504695
-                  '-Wno-incompatible-pointer-types',  # http://crbug.com/504696
                   '-Wno-int-to-void-pointer-cast',  # http://crbug.com/504697
                   '-Wno-invalid-noreturn',  # http://crbug.com/504698
                   '-Wno-logical-op-parentheses',  # http://crbug.com/504699