Mac: Accelerated views should delegate firstResponder to the RWHVMac

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 76d2c98862dfdf8d0e271fc92c24739059553cf7..74b7647e6fb9ddb6fae771c8b241ce3eb979f661 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
@@ -409,6 +409,17 @@ static CVReturn DrawOneAcceleratedPluginCallback(
   [self setCachedSize:newSize];
   [super setFrameSize:newSize];
 }
+
+- (BOOL)acceptsFirstResponder {
+  // Accept first responder if the first responder isn't the RWHVMac.
+  return [[self window] firstResponder] != [self superview];
+}
+
+- (BOOL)becomeFirstResponder {
+  // Delegate first responder to the RWHVMac.
+  [[self window] makeFirstResponder:[self superview]];
+  return YES;
+}
 @end
 
 // RenderWidgetHostView --------------------------------------------------------