[FileSystem] Move path resolution logic out of FileSpec

This patch removes the logic for resolving paths out of FileSpec and
updates call sites to rely on the FileSystem class instead.

Differential revision: https://reviews.llvm.org/D53915

llvm-svn: 345890
diff --git a/lldb/source/Commands/CommandObjectSettings.cpp b/lldb/source/Commands/CommandObjectSettings.cpp
index 48ce3753f..cceb420 100644
--- a/lldb/source/Commands/CommandObjectSettings.cpp
+++ b/lldb/source/Commands/CommandObjectSettings.cpp
@@ -403,7 +403,9 @@
 
 protected:
   bool DoExecute(Args &args, CommandReturnObject &result) override {
-    std::string path(FileSpec(m_options.m_filename, true).GetPath());
+    FileSpec file_spec(m_options.m_filename);
+    FileSystem::Instance().Resolve(file_spec);
+    std::string path(file_spec.GetPath());
     uint32_t options = File::OpenOptions::eOpenOptionWrite |
                        File::OpenOptions::eOpenOptionCanCreate;
     if (m_options.m_append)
@@ -506,7 +508,8 @@
 
 protected:
   bool DoExecute(Args &command, CommandReturnObject &result) override {
-    FileSpec file(m_options.m_filename, true);
+    FileSpec file(m_options.m_filename);
+    FileSystem::Instance().Resolve(file);
     ExecutionContext clean_ctx;
     CommandInterpreterRunOptions options;
     options.SetAddToHistory(false);