exo: Disable RGBX fullscreen overlays.

components/exo/display.cc

 // Copyright 2015 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 "components/exo/display.h"
 
 #include <iterator>
 #include <utility>
 
 #include "ash/common/shell_window_ids.h"
@@ skipping 72 matching lines @@
   if (!gpu_memory_buffer) {
     LOG(ERROR) << "Failed to create GpuMemoryBuffer from handle";
     return nullptr;
   }
 
   // Using zero-copy for optimal performance.
   bool use_zero_copy = true;
 
   // List of overlay formats that are known to be supported.
   // TODO(reveman): Determine this at runtime.
-  const gfx::BufferFormat kOverlayFormats[] = {gfx::BufferFormat::RGBA_8888,
-                                               gfx::BufferFormat::RGBX_8888};
+  // TODO(dcastagna): Re-add RGBX_8888 format.
+  const gfx::BufferFormat kOverlayFormats[] = {gfx::BufferFormat::RGBA_8888};
   bool is_overlay_candidate =
       std::find(std::begin(kOverlayFormats), std::end(kOverlayFormats),
                 format) != std::end(kOverlayFormats);
 
   return base::WrapUnique(new Buffer(
       std::move(gpu_memory_buffer), GL_TEXTURE_EXTERNAL_OES,
       // COMMANDS_COMPLETED queries are required by native pixmaps.
       GL_COMMANDS_COMPLETED_CHROMIUM, use_zero_copy, is_overlay_candidate));
 }
 #endif
@@ skipping 86 matching lines @@
       notification_surface_manager_->GetSurface(notification_id)) {
     DLOG(ERROR) << "Invalid notification id, id=" << notification_id;
     return nullptr;
   }
 
   return base::MakeUnique<NotificationSurface>(notification_surface_manager_,
                                                surface, notification_id);
 }
 
 }  // namespace exo