GM: signal error if the total number of tests run was less than expected

gm/gmmain.cpp

Index: gm/gmmain.cpp
===================================================================
--- gm/gmmain.cpp	(revision 8603)
+++ gm/gmmain.cpp	(working copy)
@@ -1825,8 +1825,10 @@
     }
     gmmain.ListErrors(FLAGS_verbose);
 
-    // TODO(epoger): in a standalone CL, enable this new check.
-#if 0
+    // TODO(epoger): Enable this check for Android, too, once we resolve
+    // https://code.google.com/p/skia/issues/detail?id=1222
+    // ('GM is unexpectedly skipping tests on Android')
+#ifdef SK_BUILD_FOR_ANDROID

[epoger, 2013/04/11 15:21:18]

Actually, Eric, whaddaya think of this for now?  At least we'll catch any
*regressions* on this point, on the non-Android platforms...

     if (expectedNumberOfTests != gmmain.fTestsRun) {
         gm_fprintf(stderr, "expected %d tests, but ran or skipped %d tests\n",
                    expectedNumberOfTests, gmmain.fTestsRun);