Hook up the ANGLE extensions for disabling client-side data.

BUG=602737
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

Review-Url: https://codereview.chromium.org/2695063003
Cr-Commit-Position: refs/heads/master@{#452542}
diff --git a/ui/gl/gl_bindings.h b/ui/gl/gl_bindings.h
index 34ec554..3592fd1 100644
--- a/ui/gl/gl_bindings.h
+++ b/ui/gl/gl_bindings.h
@@ -110,6 +110,9 @@
 // GL_ANGLE_instanced_arrays
 #define GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ANGLE             0x88FE
 
+// GL_ANGLE_client_arrays
+#define GL_CLIENT_ARRAYS_ANGLE 0x93AA
+
 // GL_EXT_occlusion_query_boolean
 #define GL_ANY_SAMPLES_PASSED_EXT                        0x8C2F
 #define GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT           0x8D6A