Reland 135525 - Add a first-class off-store install UI to chrome://extensions/.

content/browser/web_contents/web_contents_view_mac.mm

Index: content/browser/web_contents/web_contents_view_mac.mm
diff --git a/content/browser/web_contents/web_contents_view_mac.mm b/content/browser/web_contents/web_contents_view_mac.mm
index 974a850988cd0f93237c00ff4fdd8e20a440f1a4..15c704949e168471bc1e7bc44c0619f6638ed477 100644
--- a/content/browser/web_contents/web_contents_view_mac.mm
+++ b/content/browser/web_contents/web_contents_view_mac.mm
@@ -247,6 +247,10 @@ bool WebContentsViewMac::IsDoingDrag() const {
 void WebContentsViewMac::CancelDragAndCloseTab() {
 }
 
+WebDropData* WebContentsViewMac::GetDropData() const {
+  return NULL;
+}
+
 void WebContentsViewMac::UpdateDragCursor(WebDragOperation operation) {
   [cocoa_view_ setCurrentDragOperation: operation];
 }