Add warning flags to File deletion functions

Adds a flag to File::Delete and File::DeleteDir functions to control
whether a console warning is emitted when the file or directory doesn't
exist. The flag is optional and true by default to match current behavior.

Source/Core/Common/FileUtil.cpp

@@ -135,7 +135,7 @@ bool IsFile(const std::string& path)
 
 // Deletes a given filename, return true on success
 // Doesn't supports deleting a directory
-bool Delete(const std::string& filename)
+bool Delete(const std::string& filename, IfAbsentBehavior behavior)
 {
   INFO_LOG_FMT(COMMON, "Delete: file {}", filename);
 
@@ -154,7 +154,10 @@ bool Delete(const std::string& filename)
   // Return true because we care about the file not being there, not the actual delete.
   if (!file_info.Exists())
   {
-    WARN_LOG_FMT(COMMON, "Delete: {} does not exist", filename);
+    if (behavior == IfAbsentBehavior::ConsoleWarning)
+    {
+      WARN_LOG_FMT(COMMON, "Delete: {} does not exist", filename);
+    }
     return true;
   }
 
@@ -253,14 +256,17 @@ bool CreateFullPath(const std::string& fullPath)
 }
 
 // Deletes a directory filename, returns true on success
-bool DeleteDir(const std::string& filename)
+bool DeleteDir(const std::string& filename, IfAbsentBehavior behavior)
 {
   INFO_LOG_FMT(COMMON, "DeleteDir: directory {}", filename);
 
   // Return true because we care about the directory not being there, not the actual delete.
   if (!File::Exists(filename))
   {
-    WARN_LOG_FMT(COMMON, "DeleteDir: {} does not exist", filename);
+    if (behavior == IfAbsentBehavior::ConsoleWarning)
+    {
+      WARN_LOG_FMT(COMMON, "DeleteDir: {} does not exist", filename);
+    }
     return true;
   }
 

Source/Core/Common/FileUtil.h

@@ -136,12 +136,20 @@ bool CreateDir(const std::string& filename);
 // Creates the full path of fullPath returns true on success
 bool CreateFullPath(const std::string& fullPath);
 
+enum class IfAbsentBehavior
+{
+  ConsoleWarning,
+  NoConsoleWarning
+};
+
 // Deletes a given filename, return true on success
 // Doesn't supports deleting a directory
-bool Delete(const std::string& filename);
+bool Delete(const std::string& filename,
+            IfAbsentBehavior behavior = IfAbsentBehavior::ConsoleWarning);
 
 // Deletes a directory filename, returns true on success
-bool DeleteDir(const std::string& filename);
+bool DeleteDir(const std::string& filename,
+               IfAbsentBehavior behavior = IfAbsentBehavior::ConsoleWarning);
 
 // renames file srcFilename to destFilename, returns true on success
 bool Rename(const std::string& srcFilename, const std::string& destFilename);