Move webrtc/{base => rtc_base}

This refactoring takes a careful approach to avoid rushing the change:
* stub headers are left in all the old locations of webrtc/base
* existing GN targets are kept and now just forward to the moved ones
  using public_deps.
The only exception to the above is the base_java target and its .java files,
which were moved to webrtc/rtc_base right away since it's not possible
to use public_deps for android_library.
To avoid breaking builds, a temporary Dummy.java file was added to
the new intermediate target in webrtc/rtc_base:base_java as well to avoid
hitting a GN assert in the android_library template.

The above approach should make the transition smooth without breaking
downstream.

A helper script was created (https://codereview.webrtc.org/2879203002/)
and was run like this:
stub-headers.py -s webrtc/base -d webrtc/rtc_base -i 7634
stub-headers.py -s webrtc/base/numerics -d webrtc/rtc_base/numerics -i 7634

Fixed invalid header guards in the following files:
webrtc/base/base64.h
webrtc/base/cryptstring.h
webrtc/base/event.h
webrtc/base/flags.h
webrtc/base/httpbase.h
webrtc/base/httpcommon-inl.h
webrtc/base/httpcommon.h
webrtc/base/httpserver.h
webrtc/base/logsinks.h
webrtc/base/macutils.h
webrtc/base/nattypes.h
webrtc/base/openssladapter.h
webrtc/base/opensslstreamadapter.h
webrtc/base/pathutils.h
webrtc/base/physicalsocketserver.h
webrtc/base/proxyinfo.h
webrtc/base/sigslot.h
webrtc/base/sigslotrepeater.h
webrtc/base/socket.h
webrtc/base/socketaddresspair.h
webrtc/base/socketfactory.h
webrtc/base/stringutils.h
webrtc/base/testbase64.h
webrtc/base/testutils.h
webrtc/base/transformadapter.h
webrtc/base/win32filesystem.h

Added new header guards to:
sslroots.h
testbase64.h

BUG=webrtc:7634
NOTRY=True
NOPRESUBMIT=True
R=kwiberg@webrtc.org

Review-Url: https://codereview.webrtc.org/2877023002 .
Cr-Commit-Position: refs/heads/master@{#18816}

webrtc/base/socket_unittest.h

@@ -11,90 +11,9 @@
 #ifndef WEBRTC_BASE_SOCKET_UNITTEST_H_
 #define WEBRTC_BASE_SOCKET_UNITTEST_H_
 
-#include "webrtc/base/gunit.h"
-#include "webrtc/base/thread.h"
 
-namespace rtc {
-
-// Generic socket tests, to be used when testing individual socketservers.
-// Derive your specific test class from SocketTest, install your
-// socketserver, and call the SocketTest test methods.
-class SocketTest : public testing::Test {
- protected:
-  SocketTest() : kIPv4Loopback(INADDR_LOOPBACK),
-                 kIPv6Loopback(in6addr_loopback),
-                 ss_(nullptr) {}
-  virtual void SetUp() { ss_ = Thread::Current()->socketserver(); }
-  void TestConnectIPv4();
-  void TestConnectIPv6();
-  void TestConnectWithDnsLookupIPv4();
-  void TestConnectWithDnsLookupIPv6();
-  void TestConnectFailIPv4();
-  void TestConnectFailIPv6();
-  void TestConnectWithDnsLookupFailIPv4();
-  void TestConnectWithDnsLookupFailIPv6();
-  void TestConnectWithClosedSocketIPv4();
-  void TestConnectWithClosedSocketIPv6();
-  void TestConnectWhileNotClosedIPv4();
-  void TestConnectWhileNotClosedIPv6();
-  void TestServerCloseDuringConnectIPv4();
-  void TestServerCloseDuringConnectIPv6();
-  void TestClientCloseDuringConnectIPv4();
-  void TestClientCloseDuringConnectIPv6();
-  void TestServerCloseIPv4();
-  void TestServerCloseIPv6();
-  void TestCloseInClosedCallbackIPv4();
-  void TestCloseInClosedCallbackIPv6();
-  void TestSocketServerWaitIPv4();
-  void TestSocketServerWaitIPv6();
-  void TestTcpIPv4();
-  void TestTcpIPv6();
-  void TestSingleFlowControlCallbackIPv4();
-  void TestSingleFlowControlCallbackIPv6();
-  void TestUdpIPv4();
-  void TestUdpIPv6();
-  void TestUdpReadyToSendIPv4();
-  void TestUdpReadyToSendIPv6();
-  void TestGetSetOptionsIPv4();
-  void TestGetSetOptionsIPv6();
-  void TestSocketRecvTimestampIPv4();
-  void TestSocketRecvTimestampIPv6();
-
-  static const int kTimeout = 5000;  // ms
-  const IPAddress kIPv4Loopback;
-  const IPAddress kIPv6Loopback;
-
- protected:
-  void TcpInternal(const IPAddress& loopback, size_t data_size,
-      ptrdiff_t max_send_size);
-
- private:
-  void ConnectInternal(const IPAddress& loopback);
-  void ConnectWithDnsLookupInternal(const IPAddress& loopback,
-                                    const std::string& host);
-  void ConnectFailInternal(const IPAddress& loopback);
-
-  void ConnectWithDnsLookupFailInternal(const IPAddress& loopback);
-  void ConnectWithClosedSocketInternal(const IPAddress& loopback);
-  void ConnectWhileNotClosedInternal(const IPAddress& loopback);
-  void ServerCloseDuringConnectInternal(const IPAddress& loopback);
-  void ClientCloseDuringConnectInternal(const IPAddress& loopback);
-  void ServerCloseInternal(const IPAddress& loopback);
-  void CloseInClosedCallbackInternal(const IPAddress& loopback);
-  void SocketServerWaitInternal(const IPAddress& loopback);
-  void SingleFlowControlCallbackInternal(const IPAddress& loopback);
-  void UdpInternal(const IPAddress& loopback);
-  void UdpReadyToSend(const IPAddress& loopback);
-  void GetSetOptionsInternal(const IPAddress& loopback);
-  void SocketRecvTimestamp(const IPAddress& loopback);
-
-  SocketServer* ss_;
-};
-
-// For unbound sockets, GetLocalAddress / GetRemoteAddress return AF_UNSPEC
-// values on Windows, but an empty address of the same family on Linux/MacOS X.
-bool IsUnspecOrEmptyIP(const IPAddress& address);
-
-}  // namespace rtc
+// This header is deprecated and is just left here temporarily during
+// refactoring. See https://bugs.webrtc.org/7634 for more details.
+#include "webrtc/rtc_base/socket_unittest.h"
 
 #endif  // WEBRTC_BASE_SOCKET_UNITTEST_H_