[Ozone-DRI] Convert HardwareDisplayController to use scanout buffers

ui/ozone/platform/dri/test/mock_dri_wrapper.h

Index: ui/ozone/platform/dri/test/mock_dri_wrapper.h
diff --git a/ui/ozone/platform/dri/test/mock_dri_wrapper.h b/ui/ozone/platform/dri/test/mock_dri_wrapper.h
index 4c5fd6aef358a87b0d26d067626a6eb1546c2a67..3dc09f43d55c701a7f7053594fa341e4a854ee93 100644
--- a/ui/ozone/platform/dri/test/mock_dri_wrapper.h
+++ b/ui/ozone/platform/dri/test/mock_dri_wrapper.h
@@ -13,6 +13,8 @@
 
 namespace ui {
 
+class HardwareDisplayController;
+
 // The real DriWrapper makes actual DRM calls which we can't use in unit tests.
 class MockDriWrapper : public ui::DriWrapper {
  public:
@@ -39,6 +41,8 @@ class MockDriWrapper : public ui::DriWrapper {
     create_dumb_buffer_expectation_ = state;
   }
 
+  uint32_t current_framebuffer() const { return current_framebuffer_; }
+
   const std::vector<skia::RefPtr<SkSurface> > buffers() const {
     return buffers_;
   }
@@ -100,8 +104,12 @@ class MockDriWrapper : public ui::DriWrapper {
   bool page_flip_expectation_;
   bool create_dumb_buffer_expectation_;
 
+  uint32_t current_framebuffer_;
+
   std::vector<skia::RefPtr<SkSurface> > buffers_;
 
+  HardwareDisplayController* controller_;
+
   DISALLOW_COPY_AND_ASSIGN(MockDriWrapper);
 };