iwyu fixes on lldbUtility.

This patch makes adjustments to header file includes in
lldbUtility based on recommendations by the iwyu tool
(include-what-you-use).  The goal here is to make sure that
all files include the exact set of headers which are needed
for that file only, to eliminate cases of dead includes (e.g.
someone deleted some code but forgot to delete the header
includes that that code necessitated), and to eliminate the
case where header includes are picked up transitively.

llvm-svn: 299676

lldb/source/Utility/SelectHelper.cpp

@@ -14,7 +14,18 @@
 #define _DARWIN_UNLIMITED_SELECT
 #endif
 
-// C Includes
+#include "lldb/Utility/SelectHelper.h"
+#include "lldb/Utility/Error.h"
+#include "lldb/Utility/LLDBAssert.h"
+#include "lldb/lldb-enumerations.h" // for ErrorType::eErrorTypePOSIX
+#include "lldb/lldb-types.h"        // for socket_t
+
+#include "llvm/ADT/DenseMap.h" // for DenseMapPair, DenseMap, Dense...
+#include "llvm/ADT/Optional.h" // for Optional
+
+#include <algorithm>
+#include <chrono> // for microseconds, seconds, steady...
+
 #include <errno.h>
 #if defined(_WIN32)
 // Define NOMINMAX to avoid macros that conflict with std::min and std::max
@@ -24,16 +35,6 @@
 #include <sys/select.h>
 #endif
 
-// C++ Includes
-#include <algorithm>
-
-// Other libraries and framework includes
-#include "llvm/ADT/SmallVector.h"
-
-// Project includes
-#include "lldb/Utility/Error.h"
-#include "lldb/Utility/LLDBAssert.h"
-#include "lldb/Utility/SelectHelper.h"
 
 SelectHelper::SelectHelper()
     : m_fd_map(), m_end_time() // Infinite timeout unless