Add a platform implementation of QuicTest and QuicTestWithParam

net/quic/core/congestion_control/bandwidth_sampler_test.cc

Index: net/quic/core/congestion_control/bandwidth_sampler_test.cc
diff --git a/net/quic/core/congestion_control/bandwidth_sampler_test.cc b/net/quic/core/congestion_control/bandwidth_sampler_test.cc
index bf6f7e6c5d91ce99df398891f248439dd81ec377..aa9bdd0e56ccef7c839240e8c7bd0c054a67138b 100644
--- a/net/quic/core/congestion_control/bandwidth_sampler_test.cc
+++ b/net/quic/core/congestion_control/bandwidth_sampler_test.cc
@@ -4,9 +4,8 @@
 
 #include "net/quic/core/congestion_control/bandwidth_sampler.h"
 
+#include "net/quic/platform/api/quic_test.h"
 #include "net/quic/test_tools/mock_clock.h"
-#include "testing/gmock/include/gmock/gmock.h"
-#include "testing/gtest/include/gtest/gtest.h"
 
 namespace net {
 namespace test {
@@ -30,7 +29,7 @@ static_assert((kRegularPacketSize & 31) == 0,
               "kRegularPacketSize has to be five times divisible by 2");
 
 // A test fixture with utility methods for BandwidthSampler tests.
-class BandwidthSamplerTest : public ::testing::Test {
+class BandwidthSamplerTest : public QuicTest {
  protected:
   BandwidthSamplerTest() : bytes_in_flight_(0) {
     // Ensure that the clock does not start at zero.