Add prefix to empty param tests.

googletest will no longer support empty prefix
for parameterized INSTANTIATE_TEST_SUITE_P.
Adding "All" prefix to existing empty prefix test suites.

This CL was uploaded by git cl split.

R=alexilin@chromium.org

Bug: 1023677
Change-Id: I5e9d0eeafc9c1d89454c1ef489c14ead6f0b14da
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1926936
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Alex Ilin <alexilin@chromium.org>
Commit-Queue: Alex Ilin <alexilin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717264}

chrome/browser/predictors/resource_prefetch_predictor_unittest.cc

@@ -723,7 +723,7 @@ class ResourcePrefetchPredictorPreconnectToRedirectTargetTest
       public ::testing::WithParamInterface<bool> {};
 
 INSTANTIATE_TEST_SUITE_P(
-    ,
+    All,
     ResourcePrefetchPredictorPreconnectToRedirectTargetTest,
     ::testing::Values(false, true));