Fix computation of texture size for approximately-fit deferred proxies

For approximate-fit deferred proxies asserts were firing when the instantiated size was larger than the pre-computed exact-fit size.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4972

Change-Id: I879e16b86ab4d9ef9834163c24ccd6507fe4b94a
Reviewed-on: https://skia-review.googlesource.com/4972
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/tests/ProxyTest.cpp b/tests/ProxyTest.cpp
index 8d59cae..a228e16 100644
--- a/tests/ProxyTest.cpp
+++ b/tests/ProxyTest.cpp
@@ -136,6 +136,13 @@
                                 sk_sp<GrSurfaceProxy> sProxy(GrSurfaceProxy::MakeDeferred(
                                                                                 caps, desc, 
                                                                                 fit, budgeted));
+                                // This forces the proxy to compute and cache its pre-instantiation

+                                // size guess. Later, when it is actually instantiated, it checks

+                                // that the instantiated size is <= to the pre-computation. 

+                                // If the proxy never computed its pre-instantiation size then the

+                                // check is skipped.

+                                sProxy->gpuMemorySize();
+
                                 check_surface(reporter, sProxy.get(), origin,
                                               widthHeight, widthHeight, config,
                                               kInvalidResourceID, budgeted);
@@ -151,6 +158,13 @@
                                                                                       desc,
                                                                                       fit,
                                                                                       budgeted));
+                            // This forces the proxy to compute and cache its pre-instantiation

+                            // size guess. Later, when it is actually instantiated, it checks

+                            // that the instantiated size is <= to the pre-computation. 

+                            // If the proxy never computed its pre-instantiation size then the

+                            // check is skipped.
+                            sProxy->gpuMemorySize();
+
                             check_surface(reporter, sProxy.get(), origin,
                                           widthHeight, widthHeight, config,
                                           kInvalidResourceID, budgeted);