Everywhere: Pass AK::StringView by value

Userland/Libraries/LibCore/IODevice.cpp

@@ -294,7 +294,7 @@ void IODevice::set_fd(int fd)
     did_update_fd(fd);
 }
 
-bool IODevice::write(const StringView& v)
+bool IODevice::write(StringView v)
 {
     return write((const u8*)v.characters_without_null_termination(), v.length());
 }

Userland/Libraries/LibCore/IODevice.h

@@ -75,7 +75,7 @@ public:
     String read_line(size_t max_size = 16384);
 
     bool write(const u8*, int size);
-    bool write(const StringView&);
+    bool write(StringView);
 
     bool truncate(off_t);
 

Userland/Libraries/LibCore/MimeData.cpp

@@ -50,7 +50,7 @@ void MimeData::set_text(const String& text)
     set_data("text/plain", text.to_byte_buffer());
 }
 
-String guess_mime_type_based_on_filename(const StringView& path)
+String guess_mime_type_based_on_filename(StringView path)
 {
     if (path.ends_with(".pbm", CaseSensitivity::CaseInsensitive))
         return "image/x‑portable‑bitmap";

Userland/Libraries/LibCore/MimeData.h

@@ -47,7 +47,7 @@ private:
     HashMap<String, ByteBuffer> m_data;
 };
 
-String guess_mime_type_based_on_filename(const StringView&);
+String guess_mime_type_based_on_filename(StringView);
 
 Optional<String> guess_mime_type_based_on_sniffed_bytes(const ReadonlyBytes&);