ozone: Create GbmBuffers from fourcc formats and gbm flags.

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

Index: ui/ozone/platform/drm/gpu/mock_dumb_buffer_generator.cc
diff --git a/ui/ozone/platform/drm/gpu/mock_dumb_buffer_generator.cc b/ui/ozone/platform/drm/gpu/mock_dumb_buffer_generator.cc
index c0c62f05c9dd6310840ef758b544da9b0722579f..d6d0cf7efd15ccf5a6be0fe8a842167e955521f3 100644
--- a/ui/ozone/platform/drm/gpu/mock_dumb_buffer_generator.cc
+++ b/ui/ozone/platform/drm/gpu/mock_dumb_buffer_generator.cc
@@ -15,7 +15,7 @@ MockDumbBufferGenerator::~MockDumbBufferGenerator() {}
 
 scoped_refptr<ScanoutBuffer> MockDumbBufferGenerator::Create(
     const scoped_refptr<DrmDevice>& drm,
-    gfx::BufferFormat format,
+    uint32_t format,
     const gfx::Size& size) {
   scoped_refptr<DrmBuffer> buffer(new DrmBuffer(drm));
   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());