Turn libbase into a component

src/base/debug/stack_trace.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Slightly adapted for inclusion in V8.
 // Copyright 2016 the V8 project authors. All rights reserved.
 
 #ifndef V8_BASE_DEBUG_STACK_TRACE_H_
 #define V8_BASE_DEBUG_STACK_TRACE_H_
 
 #include <stddef.h>
 
 #include <iosfwd>
 #include <string>
 
+#include "src/base/base-export.h"
 #include "src/base/build_config.h"
 
 #if V8_OS_POSIX
 #include <unistd.h>
 #endif
 
 #if V8_OS_WIN
 struct _EXCEPTION_POINTERS;
 struct _CONTEXT;
 #endif
 
 namespace v8 {
 namespace base {
 namespace debug {
 
 // Enables stack dump to console output on exception and signals.
 // When enabled, the process will quit immediately. This is meant to be used in
 // tests only!
-bool EnableInProcessStackDumping();
-void DisableSignalStackDump();
+V8_BASE_EXPORT bool EnableInProcessStackDumping();
+V8_BASE_EXPORT void DisableSignalStackDump();
 
 // A stacktrace can be helpful in debugging. For example, you can include a
 // stacktrace member in a object (probably around #ifndef NDEBUG) so that you
 // can later see where the given object was created from.
 class StackTrace {
  public:
   // Creates a stacktrace from the current location.
   StackTrace();
 
   // Creates a stacktrace from an existing array of instruction
@@ skipping 41 matching lines @@
 
   // The number of valid frames in |trace_|.
   size_t count_;
 };
 
 }  // namespace debug
 }  // namespace base
 }  // namespace v8
 
 #endif  // V8_BASE_DEBUG_STACK_TRACE_H_