Move quic_flags.h from net/quic/core to net/quic/platform and split into api and impl.

net/tools/quic/quic_dispatcher_test.cc

Index: net/tools/quic/quic_dispatcher_test.cc
diff --git a/net/tools/quic/quic_dispatcher_test.cc b/net/tools/quic/quic_dispatcher_test.cc
index 46f52c11f743a0c681d2da780916563bd8e9c1c4..3f3f235180e232df8aaf3587cd4ca060aa08ad92 100644
--- a/net/tools/quic/quic_dispatcher_test.cc
+++ b/net/tools/quic/quic_dispatcher_test.cc
@@ -13,8 +13,8 @@
 #include "net/quic/core/crypto/quic_crypto_server_config.h"
 #include "net/quic/core/crypto/quic_random.h"
 #include "net/quic/core/quic_crypto_stream.h"
-#include "net/quic/core/quic_flags.h"
 #include "net/quic/core/quic_utils.h"
+#include "net/quic/platform/api/quic_flags.h"
 #include "net/quic/platform/api/quic_logging.h"
 #include "net/quic/platform/api/quic_str_cat.h"
 #include "net/quic/test_tools/crypto_test_utils.h"
@@ -535,7 +535,7 @@ TEST_F(QuicDispatcherTest, SupportedVersionsChangeInFlight) {
   static_assert(arraysize(kSupportedQuicVersions) == 5u,
                 "Supported versions out of sync");
   FLAGS_quic_reloadable_flag_quic_enable_version_38 = true;
-  base::SetFlag(&FLAGS_quic_enable_version_39, true);
+  SetQuicFlag(&FLAGS_quic_enable_version_39, true);
   QuicSocketAddress client_address(QuicIpAddress::Loopback4(), 1);
   server_address_ = QuicSocketAddress(QuicIpAddress::Any4(), 5);
   QuicConnectionId connection_id = 1;
@@ -575,7 +575,7 @@ TEST_F(QuicDispatcherTest, SupportedVersionsChangeInFlight) {
                 PACKET_6BYTE_PACKET_NUMBER, 1);
 
   // Turn off version 39.
-  base::SetFlag(&FLAGS_quic_enable_version_39, false);
+  SetQuicFlag(&FLAGS_quic_enable_version_39, false);
   ++connection_id;
   EXPECT_CALL(*dispatcher_, CreateQuicSession(connection_id, client_address))
       .Times(0);
@@ -584,7 +584,7 @@ TEST_F(QuicDispatcherTest, SupportedVersionsChangeInFlight) {
                 PACKET_6BYTE_PACKET_NUMBER, 1);
 
   // Turn on version 39.
-  base::SetFlag(&FLAGS_quic_enable_version_39, true);
+  SetQuicFlag(&FLAGS_quic_enable_version_39, true);
   ++connection_id;
   EXPECT_CALL(*dispatcher_, CreateQuicSession(connection_id, client_address))
       .WillOnce(testing::Return(CreateSession(