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=shivanisha@chromium.org

Bug: 1023677
Change-Id: I5c0076283f6820c7f65d307a6f5280630093afc3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1957532
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Shivani Sharma <shivanisha@chromium.org>
Commit-Queue: Ilia Samsonov <isamsonov@google.com>
Cr-Commit-Position: refs/heads/master@{#726548}

net/http/http_cache_unittest.cc

@@ -863,7 +863,7 @@ TEST_P(HttpCacheTest_SplitCacheFeature, SimpleGETVerifyGoogleFontMetrics) {
 }
 
 INSTANTIATE_TEST_SUITE_P(
-    /* no prefix */,
+    All,
     HttpCacheTest_SplitCacheFeature,
     testing::Bool());
 
@@ -12599,7 +12599,7 @@ class HttpCacheMemoryDumpTest
       public WithTaskEnvironment {};
 
 INSTANTIATE_TEST_SUITE_P(
-    /* no prefix */,
+    All,
     HttpCacheMemoryDumpTest,
     ::testing::Values(base::trace_event::MemoryDumpLevelOfDetail::DETAILED,
                       base::trace_event::MemoryDumpLevelOfDetail::BACKGROUND));