Set the default discardable pool size for Android framework.

BUG=skia:2389
R=halcanary@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/303893002

git-svn-id: http://skia.googlecode.com/svn/trunk@14939 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/common_conditions.gypi b/gyp/common_conditions.gypi
index 5202630..75b89b7 100644
--- a/gyp/common_conditions.gypi
+++ b/gyp/common_conditions.gypi
@@ -319,6 +319,7 @@
         # Transitional, for deprecated SkCanvas::SaveFlags methods.
         'SK_ATTR_DEPRECATED=SK_NOTHING_ARG1',
         'SK_SUPPORT_LEGACY_SHADER_LOCALMATRIX',
+        'SK_DEFAULT_GLOBAL_DISCARDABLE_MEMORY_POOL_SIZE (512 * 1024)',
       ],
     }],