Fixes some memory leaks in //runtime/bin

runtime/bin/platform_linux.cc

 // Copyright (c) 2012, 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.
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_LINUX)
 
 #include "bin/file.h"
 #include "bin/platform.h"
 
 #include <signal.h>  // NOLINT
 #include <string.h>  // NOLINT
 #include <unistd.h>  // NOLINT
 
 #include "bin/fdutils.h"
 
-
 namespace dart {
 namespace bin {
 
 bool Platform::Initialize() {
   // Turn off the signal handler for SIGPIPE as it causes the process
   // to terminate on writing to a closed pipe. Without the signal
   // handler error EPIPE is set instead.
   struct sigaction act;
   bzero(&act, sizeof(act));
   act.sa_handler = SIG_IGN;
@@ skipping 23 matching lines @@
 bool Platform::LocalHostname(char *buffer, intptr_t buffer_length) {
   return gethostname(buffer, buffer_length) == 0;
 }
 
 
 char** Platform::Environment(intptr_t* count) {
   // Using environ directly is only safe as long as we do not
   // provide access to modifying environment variables.
   intptr_t i = 0;
   char** tmp = environ;
-  while (*(tmp++) != NULL) i++;
+  while (*(tmp++) != NULL) {
+    i++;
+  }
   *count = i;
-  char** result = new char*[i];
+  char** result;
+  result = reinterpret_cast<char**>(Dart_ScopeAllocate(i * sizeof(*result)));
   for (intptr_t current = 0; current < i; current++) {
     result[current] = environ[current];
   }
   return result;
 }
 
 
-void Platform::FreeEnvironment(char** env, intptr_t count) {
-  delete[] env;
+const char* Platform::ResolveExecutablePath() {
+  return File::LinkTarget("/proc/self/exe");
 }
 
 
-char* Platform::ResolveExecutablePath() {
-  return File::LinkTarget("/proc/self/exe");
-}
-
 void Platform::Exit(int exit_code) {
   exit(exit_code);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)