Mus: Fixes rendering of transparent containers.

components/mus/ws/platform_display.h

Index: components/mus/ws/platform_display.h
diff --git a/components/mus/ws/platform_display.h b/components/mus/ws/platform_display.h
index 9b19220f23469c7adea1c198ef0fc0ade5fa6b9f..a7f2600c52cfdecad4cccc3af7b57458aa62bd15 100644
--- a/components/mus/ws/platform_display.h
+++ b/components/mus/ws/platform_display.h
@@ -53,6 +53,10 @@ class DisplayCompositor;
 
 namespace ws {
 
+namespace test {
+class PlatformDisplayTest;
+}
+
 class EventDispatcher;
 class PlatformDisplayFactory;
 class ServerWindow;
@@ -137,7 +141,13 @@ class DefaultPlatformDisplay : public PlatformDisplay,
       std::unique_ptr<cc::CopyOutputRequest> output_request) override;
   int64_t GetDisplayId() const override;
 
+  void set_delegate_for_testing(PlatformDisplayDelegate* delegate) {
+    delegate_ = delegate;
+  }
+
  private:
+  friend class mus::ws::test::PlatformDisplayTest;

[sky, 2016/06/27 15:17:08]

If you're going to friend this, then don't bother with the set function.

[mfomitchev, 2016/06/30 22:06:03]

Done.

+
   void WantToDraw();
 
   // This method initiates a top level redraw of the display.