browser-plugin: Accept drags through the new WebPlugin interface

content/renderer/browser_plugin/browser_plugin.cc

Index: content/renderer/browser_plugin/browser_plugin.cc
diff --git a/content/renderer/browser_plugin/browser_plugin.cc b/content/renderer/browser_plugin/browser_plugin.cc
index 6139b839c0b5fb59bee0e1fcb2196686c49dbba4..c8b3779df7f52eff24f1628a21883649c6de7f68 100644
--- a/content/renderer/browser_plugin/browser_plugin.cc
+++ b/content/renderer/browser_plugin/browser_plugin.cc
@@ -549,6 +549,10 @@ bool BrowserPlugin::supportsKeyboardFocus() const {
   return true;
 }
 
+bool BrowserPlugin::canProcessDrag() const {
+  return true;
+}
+
 void BrowserPlugin::paint(WebCanvas* canvas, const WebRect& rect) {
   if (guest_crashed_) {
     if (!sad_guest_)  // Lazily initialize bitmap.