[Material][Mac] Action on Mouse Down for User Account Button

chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm

Index: chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
diff --git a/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm b/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
index 6163f015f1daf352ec8af7f7bcdc90c51664d6d1..2305f8afd3fcd5a1cbbeaa76c2d10b32c51b5bcb 100644
--- a/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
+++ b/chrome/browser/ui/cocoa/profiles/avatar_button_controller.mm
@@ -224,6 +224,9 @@ const CGFloat kMaterialSignedOutWidthPadding = 2;
     [avatarButton setAction:@selector(buttonClicked:)];
     [avatarButton setRightAction:@selector(buttonRightClicked:)];
 
+    if (ui::MaterialDesignController::IsModeMaterial())
+      [avatarButton sendActionOn:NSLeftMouseDownMask];
+
     // Check if the account already has an authentication or sync error and
     // initialize the avatar button UI.
     hasError_ = profileObserver_->HasAvatarError();