fuchsia: add base_paths_fuchsia.cc

base/base_paths_posix.cc

 // 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.
 
 // Defines base::PathProviderPosix, default path provider on POSIX OSes that
 // don't have their own base_paths_OS.cc implementation (i.e. all but Mac and
 // Android).
 
 #include "base/base_paths.h"
 
@@ skipping 16 matching lines @@
 #if defined(OS_FREEBSD)
 #include <sys/param.h>
 #include <sys/sysctl.h>
 #elif defined(OS_SOLARIS) || defined(OS_AIX)
 #include <stdlib.h>
 #endif
 
 namespace base {
 
 bool PathProviderPosix(int key, FilePath* result) {
-  FilePath path;
   switch (key) {
     case FILE_EXE:
     case FILE_MODULE: {  // TODO(evanm): is this correct?
 #if defined(OS_LINUX)
       FilePath bin_dir;
       if (!ReadSymbolicLink(FilePath(kProcSelfExe), &bin_dir)) {
         NOTREACHED() << "Unable to resolve " << kProcSelfExe << ".";
         return false;
       }
       *result = bin_dir;
@@ skipping 27 matching lines @@
       else
         *result = FilePath("/usr/local/chrome/chrome");
       return true;
 #endif
     }
     case DIR_SOURCE_ROOT: {
       // Allow passing this in the environment, for more flexibility in build
       // tree configurations (sub-project builds, gyp --output_dir, etc.)
       std::unique_ptr<Environment> env(Environment::Create());
       std::string cr_source_root;
+      FilePath path;
       if (env->GetVar("CR_SOURCE_ROOT", &cr_source_root)) {
         path = FilePath(cr_source_root);
         if (PathExists(path)) {
           *result = path;
           return true;
         }
         DLOG(WARNING) << "CR_SOURCE_ROOT is set, but it appears to not "
                       << "point to a directory.";
       }
       // On POSIX, unit tests execute two levels deep from the source root.
@@ skipping 15 matching lines @@
       FilePath cache_dir(
           nix::GetXDGDirectory(env.get(), "XDG_CACHE_HOME", ".cache"));
       *result = cache_dir;
       return true;
     }
   }
   return false;
 }
 
 }  // namespace base