Add GrContext::oomed() and implement for GL and VK.

Surfaces to client whether GrContext has seen a GL_OUT_MEMORY,
VK_ERROR_OUT_OF_HOST_MEMORY, or VK_ERROR_OUT_OF_DEVICE_MEMORY error.

Bug: chromium:1093997
Change-Id: I8e9799a0f7d8a74df056629d7d1d07c0d0a0fe30
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/298216
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/gn/tests.gni b/gn/tests.gni
index 47968bb..70ef573 100644
--- a/gn/tests.gni
+++ b/gn/tests.gni
@@ -103,6 +103,7 @@
   "$_tests/GrCCPRTest.cpp",
   "$_tests/GrContextAbandonTest.cpp",
   "$_tests/GrContextFactoryTest.cpp",
+  "$_tests/GrContextOOM.cpp",
   "$_tests/GrFinishedFlushTest.cpp",
   "$_tests/GrMemoryPoolTest.cpp",
   "$_tests/GrMeshTest.cpp",