Android should be able to copy HTML snippets to the system clipboard.

ui/base/clipboard/clipboard_android.cc

Index: ui/base/clipboard/clipboard_android.cc
diff --git a/ui/base/clipboard/clipboard_android.cc b/ui/base/clipboard/clipboard_android.cc
index 22f75c194eba4e98758a7abdabc2b3bb3d8aac85..f3d7c93c5435e58596a8ecfd359a0271819d5828 100644
--- a/ui/base/clipboard/clipboard_android.cc
+++ b/ui/base/clipboard/clipboard_android.cc
@@ -97,10 +97,24 @@ void ClipboardMap::Set(const std::string& format, const std::string& data) {
 
   map_[format] = data;
   if (format == kPlainTextFormat) {
-    ScopedJavaLocalRef<jstring> str = ConvertUTF8ToJavaString(
-        env, data.c_str());
-    DCHECK(str.obj() && !ClearException(env));
+    ScopedJavaLocalRef<jstring> str = ConvertUTF8ToJavaString(env, data);
+    DCHECK(str.obj());
+
     Java_Clipboard_setText(env, clipboard_manager_.obj(), str.obj());
+  } else if (format == kHTMLFormat) {
+    // Android's API for storing HTML content on the clipboard requires a plain-
+    // text representation to be available as well. Because of an std::map's
+    // keys being ordered, any plain-text representation will be set already.

[bulach, 2013/10/25 14:32:47]

I'm not quite sure what std::map order has to do here?
presumably the caller can call just Set(kHTMLFormat, "<b>Foo</b>") without ever
calling Set(kPlainTextFormat, "..."); ?

maybe:

// ..requires a plain-text representation to be available as well.
// If there isn't kPlainTextFormat data, don't put just the HTML
// representation, otherwise older apps may not be able to paste it.

[Peter Beverloo, 2013/10/25 15:29:37]

Done.

+    if (!ContainsKey(map_, kPlainTextFormat))
+      return;
+
+    ScopedJavaLocalRef<jstring> html = ConvertUTF8ToJavaString(env, data);
+    ScopedJavaLocalRef<jstring> text = ConvertUTF8ToJavaString(
+        env, map_[kPlainTextFormat].c_str());
+
+    DCHECK(html.obj() && text.obj());
+    Java_Clipboard_setHTMLText(
+        env, clipboard_manager_.obj(), html.obj(), text.obj());
   }
 }