Allow chrome to use old version of installPixels.

R=jvanverth@google.com, reed@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/312703003
diff --git a/gyp/skia_for_chromium_defines.gypi b/gyp/skia_for_chromium_defines.gypi
index 99472de..ff8ebc2 100644
--- a/gyp/skia_for_chromium_defines.gypi
+++ b/gyp/skia_for_chromium_defines.gypi
@@ -19,6 +19,7 @@
       'SK_SUPPORT_LEGACY_N32_NAME',
       'SK_IGNORE_CORRECT_HIGH_QUALITY_IMAGE_SCALE',
       'SK_IGNORE_ETC1_SUPPORT',
+      'SK_SUPPORT_LEGACY_INSTALLPIXELSPARAMS',
     ],
   },
 }