Mac: Unregress right-clicks for CoreAnimation plugins.

chrome/browser/renderer_host/render_widget_host_view_mac.mm

Index: chrome/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/chrome/browser/renderer_host/render_widget_host_view_mac.mm b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
index 49d653a3ce68328a2eea9c26d49a327b3dd27503..3f1c15ae37f2a5375ced2cd6ab1f8d05226065a6 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
@@ -237,6 +237,15 @@ static CVReturn DrawOneAcceleratedPluginCallback(
   [self drawView];
 }
 
+- (void)rightMouseDown:(NSEvent*)event {
+  // The NSResponder documentation: "Note: The NSView implementation of this
+  // method does not pass the message up the responder chain, it handles it
+  // directly."
+  // That's bad, we want the next responder (RWHVMac) to handle this event to
+  // dispatch it to the renderer.
+  [[self nextResponder] rightMouseDown:event];
+}
+
 - (void)globalFrameDidChange:(NSNotification*)notification {
   CGLLockContext(cglContext_);
   [glContext_ update];