Allow empty strings to be written to the clipboard

ui/base/clipboard/scoped_clipboard_writer.cc

Index: ui/base/clipboard/scoped_clipboard_writer.cc
diff --git a/ui/base/clipboard/scoped_clipboard_writer.cc b/ui/base/clipboard/scoped_clipboard_writer.cc
index 95cf505f8a2f0d71c68ae0ba580ab8d45db087a5..5ecb43c695e8fd796be5620a2414f110dd49242e 100644
--- a/ui/base/clipboard/scoped_clipboard_writer.cc
+++ b/ui/base/clipboard/scoped_clipboard_writer.cc
@@ -38,9 +38,6 @@ void ScopedClipboardWriter::WriteURL(const string16& text) {
 
 void ScopedClipboardWriter::WriteHTML(const string16& markup,
                                       const std::string& source_url) {
-  if (markup.empty())
-    return;
-
   std::string utf8_markup = UTF16ToUTF8(markup);
 
   Clipboard::ObjectMapParams parameters;
@@ -56,9 +53,6 @@ void ScopedClipboardWriter::WriteHTML(const string16& markup,
 }
 
 void ScopedClipboardWriter::WriteRTF(const std::string& rtf_data) {
-  if (rtf_data.empty())
-    return;
-
   Clipboard::ObjectMapParams parameters;
   parameters.push_back(Clipboard::ObjectMapParam(rtf_data.begin(),
                                                  rtf_data.end()));
@@ -139,9 +133,6 @@ void ScopedClipboardWriter::Reset() {
 }
 
 void ScopedClipboardWriter::WriteTextOrURL(const string16& text, bool is_url) {
-  if (text.empty())
-    return;
-
   std::string utf8_text = UTF16ToUTF8(text);
 
   Clipboard::ObjectMapParams parameters;