WebAppMenuButton, not HostedAppMenuButton

Update comment to refer to WebAppMenuButton.

Bug: 788051
Change-Id: I397cc63296996f0a4dc8438a45986531b4ad5718
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1819095
Auto-Submit: Eric Willigers <ericwilligers@chromium.org>
Reviewed-by: Finnur Thorarinsson <finnur@chromium.org>
Reviewed-by: Dana Fried <dfried@chromium.org>
Commit-Queue: Dana Fried <dfried@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699414}

chrome/browser/ui/views/toolbar/browser_app_menu_button.h

@@ -22,8 +22,8 @@
 class ToolbarView;
 enum class InProductHelpFeature;
 
-// The app menu button in the main browser window (as opposed to hosted app
-// windows, which is implemented in HostedAppMenuButton).
+// The app menu button in the main browser window (as opposed to web app
+// windows, which is implemented in WebAppMenuButton).
 class BrowserAppMenuButton : public AppMenuButton,
                              public ui::MaterialDesignControllerObserver {
  public: