[rAC, OSX] Autofill popup should be shown on 2nd click.

chrome/browser/ui/cocoa/autofill/autofill_textfield.h

Index: chrome/browser/ui/cocoa/autofill/autofill_textfield.h
diff --git a/chrome/browser/ui/cocoa/autofill/autofill_textfield.h b/chrome/browser/ui/cocoa/autofill/autofill_textfield.h
index f1c3c1658279fcfd696e952debaf4000929dd619..bd72e4104dcec672a0cd883c1bfc2fcbc402b023 100644
--- a/chrome/browser/ui/cocoa/autofill/autofill_textfield.h
+++ b/chrome/browser/ui/cocoa/autofill/autofill_textfield.h
@@ -15,10 +15,22 @@
 @interface AutofillTextField : NSTextField<AutofillInputField,
                                            NSTextFieldDelegate> {
  @private
-   id<AutofillInputDelegate> delegate_;
-   base::scoped_nsobject<NSString> validityMessage_;
+  id<AutofillInputDelegate> delegate_;
+  base::scoped_nsobject<NSString> validityMessage_;
+
+  // |shouldFilterFirstClick_| ensures only the very first click after
+  // -becomeFirstResponder: is treated specially.
+  BOOL shouldFilterClick_;
+
+  // YES if the field is currently handling a click that caused the field to
+  // become first responder.
+  BOOL handlingFirstClick_;
 }
 
+// Can be invoked by field editor to forward mouseDown messages from the field
+// editor to the AutofillTextField.
+- (void)onEditorMouseDown:(id)sender;
+
 @end
 
 @interface AutofillTextFieldCell : NSTextFieldCell<AutofillInputCell> {