Revert 183123

ui/base/clipboard/clipboard.cc

Index: ui/base/clipboard/clipboard.cc
===================================================================
--- ui/base/clipboard/clipboard.cc	(revision 183210)
+++ ui/base/clipboard/clipboard.cc	(working copy)
@@ -92,15 +92,6 @@
 static base::LazyInstance<base::Lock>::Leaky
     g_clipboard_map_lock = LAZY_INSTANCE_INITIALIZER;
 
-const std::size_t kSourceTagSize = sizeof(Clipboard::SourceTag);
-
-// The union serves to easily convert SourceTag into its binary representation
-// and vice versa.
-union SourceTag2BinaryHelper {
-  Clipboard::SourceTag tag;
-  uint8 bytes[kSourceTagSize];
-};
-
 }  // namespace
 
 const char Clipboard::kMimeTypeText[] = "text/plain";
@@ -111,24 +102,6 @@
 const char Clipboard::kMimeTypePNG[] = "image/png";
 
 // static
-Clipboard::ObjectMapParam Clipboard::SourceTag2Binary(SourceTag tag) {
-  SourceTag2BinaryHelper helper;
-  helper.tag = tag;
-  std::vector<char> bytes(kSourceTagSize);
-  memcpy(&bytes[0], helper.bytes, kSourceTagSize);
-  return bytes;
-}
-
-// static
-Clipboard::SourceTag Clipboard::Binary2SourceTag(const std::string& binary) {
-  if (binary.size() != kSourceTagSize)
-    return SourceTag();
-  SourceTag2BinaryHelper helper;
-  memcpy(helper.bytes, binary.c_str(), kSourceTagSize);
-  return helper.tag;
-}
-
-// static
 void Clipboard::SetAllowedThreads(
     const std::vector<base::PlatformThreadId>& allowed_threads) {
   base::AutoLock lock(g_clipboard_map_lock.Get());
@@ -180,14 +153,6 @@
   }
 }
 
-void Clipboard::WriteObjects(Buffer buffer,
-                             const ObjectMap& objects,
-                             SourceTag tag) {
-  WriteObjectsImpl(buffer, objects, tag);
-  if (!write_objects_callback_.is_null())
-    write_objects_callback_.Run(buffer);
-}
-
 void Clipboard::DispatchObject(ObjectType type, const ObjectMapParams& params) {
   // All types apart from CBF_WEBKIT need at least 1 non-empty param.
   if (type != CBF_WEBKIT && (params.empty() || params[0].empty()))