gpu: Add "main" files for Dawn's gtest targets.

Also changes existing test targets to use base::BindOnce instead of the
deprecated base::Bind, and removes some unused includes.

[email protected]

BUG=chromium:870747

Change-Id: Ib94ffd228a6057a7010e8581ccb3392ae700c357
Reviewed-on: https://chromium-review.googlesource.com/c/1307510
Reviewed-by: Kenneth Russell <[email protected]>
Commit-Queue: Corentin Wallez <[email protected]>
Cr-Commit-Position: refs/heads/master@{#603945}
diff --git a/gpu/angle_end2end_tests_main.cc b/gpu/angle_end2end_tests_main.cc
index 272cf29..cb2c65e 100644
--- a/gpu/angle_end2end_tests_main.cc
+++ b/gpu/angle_end2end_tests_main.cc
@@ -2,14 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/test/launcher/unit_test_launcher.h"
 #include "base/test/test_suite.h"
 #include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/angle/src/tests/test_utils/ANGLETest.h"
 
 namespace {
@@ -27,11 +25,10 @@
   testing::AddGlobalTestEnvironment(new ANGLETestEnvironment());
   base::TestSuite test_suite(argc, argv);
   int rt = base::LaunchUnitTestsWithOptions(
-      argc,
-      argv,
-      1,  // Run tests serially.
-      0,  // Disable batching.
+      argc, argv,
+      1,     // Run tests serially.
+      0,     // Disable batching.
       true,  // Use job objects.
-      base::Bind(&RunHelper, base::Unretained(&test_suite)));
+      base::BindOnce(&RunHelper, base::Unretained(&test_suite)));
   return rt;
 }