Fuchsia: Build standalone VM. Make it run "Hello, World!".

runtime/bin/process_fuchsia.cc

Index: runtime/bin/process_fuchsia.cc
diff --git a/runtime/bin/process_fuchsia.cc b/runtime/bin/process_fuchsia.cc
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+++ b/runtime/bin/process_fuchsia.cc
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+// Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#if !defined(DART_IO_DISABLED)
+
+#include "platform/globals.h"
+#if defined(TARGET_OS_FUCHSIA)
+
+#include "bin/process.h"
+
+#include "bin/lockers.h"
+#include "platform/assert.h"
+
+
+namespace dart {
+namespace bin {
+
+int Process::global_exit_code_ = 0;
+Mutex* Process::global_exit_code_mutex_ = new Mutex();
+
+void Process::TerminateExitCodeHandler() {
+}
+
+intptr_t Process::CurrentProcessId() {
+  UNIMPLEMENTED();
+  return 0;
+}
+
+intptr_t Process::SetSignalHandler(intptr_t signal) {
+  UNIMPLEMENTED();
+  return -1;
+}
+
+
+void Process::ClearSignalHandler(intptr_t signal) {
+  UNIMPLEMENTED();
+}
+
+bool Process::Wait(intptr_t pid,
+                   intptr_t in,
+                   intptr_t out,
+                   intptr_t err,
+                   intptr_t exit_event,
+                   ProcessResult* result) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+bool Process::Kill(intptr_t id, int signal) {
+  UNIMPLEMENTED();
+  return false;
+}
+
+int Process::Start(const char* path,
+                   char* arguments[],
+                   intptr_t arguments_length,
+                   const char* working_directory,
+                   char* environment[],
+                   intptr_t environment_length,
+                   ProcessStartMode mode,
+                   intptr_t* in,
+                   intptr_t* out,
+                   intptr_t* err,
+                   intptr_t* id,
+                   intptr_t* exit_event,
+                   char** os_error_message) {
+  UNIMPLEMENTED();
+  return -1;
+}
+
+}  // namespace bin
+}  // namespace dart
+
+#endif  // defined(TARGET_OS_FUCHSIA)
+
+#endif  // !defined(DART_IO_DISABLED)