ozone: Introduce ClientPixmap and ClientPixmapFactory for non-GPU processes.

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

Index: ui/ozone/platform/drm/gpu/gbm_buffer.cc
diff --git a/ui/ozone/platform/drm/gpu/gbm_buffer.cc b/ui/ozone/platform/drm/gpu/gbm_buffer.cc
index 3783c80adcaba9eabb9a98524ab40ad9c777929a..5e016786a47e4865d8e09d042f810a8e77f79001 100644
--- a/ui/ozone/platform/drm/gpu/gbm_buffer.cc
+++ b/ui/ozone/platform/drm/gpu/gbm_buffer.cc
@@ -19,11 +19,11 @@ namespace ui {
 
 namespace {
 
-int GetGbmFormatFromBufferFormat(SurfaceFactoryOzone::BufferFormat fmt) {
+int GetGbmFormatFromNativePixmapFormat(NativePixmapFormat fmt) {
   switch (fmt) {
-    case SurfaceFactoryOzone::BGRA_8888:
+    case NATIVE_PIXMAP_FORMAT_BGRA_8888:
       return GBM_BO_FORMAT_ARGB8888;
-    case SurfaceFactoryOzone::RGBX_8888:
+    case NATIVE_PIXMAP_FORMAT_RGBX_8888:
       return GBM_BO_FORMAT_XRGB8888;
     default:
       NOTREACHED();
@@ -47,17 +47,18 @@ GbmBuffer::~GbmBuffer() {
 // static
 scoped_refptr<GbmBuffer> GbmBuffer::CreateBuffer(
     const scoped_refptr<GbmDevice>& gbm,
-    SurfaceFactoryOzone::BufferFormat format,
+    NativePixmapFormat format,
     const gfx::Size& size,
-    SurfaceFactoryOzone::BufferUsage usage) {
+    NativePixmapUsage usage) {
   TRACE_EVENT2("drm", "GbmBuffer::CreateBuffer", "device",
                gbm->device_path().value(), "size", size.ToString());
-  bool use_scanout = (usage == ui::SurfaceFactoryOzone::SCANOUT);
+  bool use_scanout = (usage == NATIVE_PIXMAP_USAGE_SCANOUT);
   unsigned flags = GBM_BO_USE_RENDERING;
+  // GBM_BO_USE_SCANOUT is the hint of x-tiling.
   if (use_scanout)
     flags |= GBM_BO_USE_SCANOUT;
   gbm_bo* bo = gbm_bo_create(gbm->device(), size.width(), size.height(),
-                             GetGbmFormatFromBufferFormat(format), flags);
+                             GetGbmFormatFromNativePixmapFormat(format), flags);
   if (!bo)
     return NULL;