Fixing opacity for browser frame window on ASH/Windows.

ash/shell/content_client/shell_browser_main_parts.cc

Index: ash/shell/content_client/shell_browser_main_parts.cc
diff --git a/ash/shell/content_client/shell_browser_main_parts.cc b/ash/shell/content_client/shell_browser_main_parts.cc
index 478453de02044d110ae4dad749384ba38268744f..2798e7f06d16b8e64d0482ed71ea3fa296351f7b 100644
--- a/ash/shell/content_client/shell_browser_main_parts.cc
+++ b/ash/shell/content_client/shell_browser_main_parts.cc
@@ -57,13 +57,16 @@ class ShellViewsDelegate : public views::TestViewsDelegate {
       views::Widget* widget) OVERRIDE {
     return ash::Shell::GetInstance()->CreateDefaultNonClientFrameView(widget);
   }
-  virtual bool UseTransparentWindows() const OVERRIDE {
-    // Ash uses transparent window frames.
-    return true;
-  }
   virtual void OnBeforeWidgetInit(
       views::Widget::InitParams* params,
       views::internal::NativeWidgetDelegate* delegate) OVERRIDE {
+    if (params->opacity == InitParams::INFER_OPACITY) {
+      if (use_transparent_windows_)
+        params->opacity = InitParams::TRANSLUCENT_WINDOW;
+      else
+        params->opacity = InitParams::OPAQUE_WINDOW;
+    }
+
     if (params->native_widget)
       return;