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=robertogden@chromium.org

Bug: 1023677
Change-Id: Icd1836250e3ea8314ec366b5aa60d726a41d85b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1926938
Auto-Submit: Ilia Samsonov <isamsonov@google.com>
Reviewed-by: Robert Ogden <robertogden@chromium.org>
Commit-Queue: Robert Ogden <robertogden@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717247}

chrome/browser/previews/defer_all_script_priority_browsertest.cc

@@ -233,7 +233,7 @@ class DeferAllScriptPriorityBrowserTest
 };
 
 // Parameter is true if the test should be run with defer feature enabled.
-INSTANTIATE_TEST_SUITE_P(,
+INSTANTIATE_TEST_SUITE_P(All,
                          DeferAllScriptPriorityBrowserTest,
                          ::testing::Bool());
 

chrome/browser/previews/resource_loading_hints/resource_loading_hints_browsertest.cc

@@ -451,7 +451,7 @@ class ResourceLoadingHintsBrowserTest
 };
 
 // First parameter determines the test webpage that should be used.
-INSTANTIATE_TEST_SUITE_P(,
+INSTANTIATE_TEST_SUITE_P(All,
                          ResourceLoadingHintsBrowserTest,
                          ::testing::Values(REGULAR_PAGE, PRELOAD_PAGE));