Fix EGLImageTest for new assert.

Change-Id: I873a17712c77413ceb09ccc9a0813a5838fe62e7
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/220754
Commit-Queue: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
diff --git a/tests/EGLImageTest.cpp b/tests/EGLImageTest.cpp
index 7014c1f..53f9b9d 100644
--- a/tests/EGLImageTest.cpp
+++ b/tests/EGLImageTest.cpp
@@ -145,6 +145,7 @@
     glCtx0->makeCurrent();
     externalTexture.fTarget = GR_GL_TEXTURE_EXTERNAL;
     externalTexture.fID = glCtx0->eglImageToExternalTexture(image);
+    externalTexture.fFormat = GR_GL_RGBA8;
     if (0 == externalTexture.fID) {
         ERRORF(reporter, "Error converting EGL Image back to texture");
         cleanup(glCtx0, externalTexture.fID, glCtx1.get(), context1, &backendTexture1, image);