Make GL_ANGLE_framebuffer_blit enableable.

BUG=angleproject:1523

Change-Id: I5d6df35d2e65be6d73ec6100e3351ba5f9ff53a2
Reviewed-on: https://chromium-review.googlesource.com/688639
Commit-Queue: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
diff --git a/src/libANGLE/validationES31.cpp b/src/libANGLE/validationES31.cpp
index d44d17f..90e94ee 100644
--- a/src/libANGLE/validationES31.cpp
+++ b/src/libANGLE/validationES31.cpp
@@ -668,7 +668,7 @@
         return false;
     }
 
-    if (!ValidFramebufferTarget(target))
+    if (!ValidFramebufferTarget(context, target))
     {
         context->handleError(InvalidEnum() << "Invalid framebuffer target.");
         return false;
@@ -744,7 +744,7 @@
         return false;
     }
 
-    if (!ValidFramebufferTarget(target))
+    if (!ValidFramebufferTarget(context, target))
     {
         ANGLE_VALIDATION_ERR(context, InvalidEnum(), InvalidFramebufferTarget);
         return false;