ozone: Create GbmBuffers from fourcc formats and gbm flags.

ui/ozone/platform/drm/gpu/screen_manager.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/ozone/platform/drm/gpu/screen_manager.h"
 
 #include <xf86drmMode.h>
 
 #include <utility>
 
@@ skipping 326 matching lines @@
   if (window) {
     const OverlayPlane* primary = window->GetLastModesetBuffer();
     const DrmDevice* drm = controller->GetAllocationDrmDevice().get();
     if (primary && primary->buffer->GetSize() == bounds.size() &&
         primary->buffer->GetDrmDevice() == drm)
       return *primary;
   }
 
   gfx::BufferFormat format = ui::DisplaySnapshot::PrimaryFormat();
   scoped_refptr<DrmDevice> drm = controller->GetAllocationDrmDevice();
+  uint32_t fourcc_format = ui::GetFourCCFormatForFramebuffer(format);
   scoped_refptr<ScanoutBuffer> buffer =
-      buffer_generator_->Create(drm, format, bounds.size());
+      buffer_generator_->Create(drm, fourcc_format, bounds.size());
   if (!buffer) {
     LOG(ERROR) << "Failed to create scanout buffer";
     return OverlayPlane(nullptr, 0, gfx::OVERLAY_TRANSFORM_INVALID, gfx::Rect(),
                         gfx::RectF());
   }
 
   FillModesetBuffer(drm, controller, buffer.get());
   return OverlayPlane(buffer);
 }
 
@@ skipping 28 matching lines @@
 DrmWindow* ScreenManager::FindWindowAt(const gfx::Rect& bounds) const {
   for (auto pair : window_map_) {
     if (pair.second->bounds() == bounds)
       return pair.second;
   }
 
   return nullptr;
 }
 
 }  // namespace ui