Move flash clipboard to the new proxy and add custom format support

ui/base/clipboard/clipboard_chromeos.cc

Index: ui/base/clipboard/clipboard_chromeos.cc
diff --git a/ui/base/clipboard/clipboard_chromeos.cc b/ui/base/clipboard/clipboard_chromeos.cc
index 0a2c4913c7f07f7b13910ecd5595ccf840ba1668..07bc12417d861697b9e24a7f6eb80e5b51804a25 100644
--- a/ui/base/clipboard/clipboard_chromeos.cc
+++ b/ui/base/clipboard/clipboard_chromeos.cc
@@ -21,6 +21,7 @@ namespace ui {
 namespace {
 const char kMimeTypeFilename[] = "chromium/filename";
 const char kMimeTypeBitmap[] = "image/bmp";
+const char kMimeTypePepperCustomData[] = "chromium/x-pepper-custom-data";
 const char kMimeTypeWebkitSmartPaste[] = "chromium/x-webkit-paste";
 const size_t kMaxClipboardSize = 1;
 
@@ -670,4 +671,10 @@ const Clipboard::FormatType& Clipboard::GetWebCustomDataFormatType() {
   return type;
 }
 
+// static
+const Clipboard::FormatType& Clipboard::GetPepperCustomDataFormatType() {
+  CR_DEFINE_STATIC_LOCAL(FormatType, type, (kMimeTypePepperCustomData));
+  return type;
+}
+
 }  // namespace ui