ozone: Implement zero/one-copy texture for Ozone GBM.

ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.cc

Index: ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.cc
diff --git a/ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.cc b/ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.cc
index 51ff149976c75b71dda485ed30d42ae6305df825..2edae910d741ac9994870b7b472772ee199cf1ee 100644
--- a/ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.cc
+++ b/ui/ozone/gpu/gpu_memory_buffer_factory_ozone_native_buffer.cc
@@ -72,6 +72,7 @@ class GLImageOzoneNativePixmapDmaBuf : public gfx::GLImageLinuxDMABuffer {
                             gfx::OverlayTransform transform,
                             const gfx::Rect& bounds_rect,
                             const gfx::RectF& crop_rect) override {
+    DCHECK(pixmap_->GetBufferUsage() == NativePixmap::SCANOUT);

[reveman, 2015/05/11 16:40:57]

nit: use DCHECK_EQ

[dshwang, 2015/05/14 12:25:47]

Done.

     return SurfaceFactoryOzone::GetInstance()->ScheduleOverlayPlane(
         widget, z_order, transform, pixmap_, bounds_rect, crop_rect);
   }
@@ -139,11 +140,12 @@ bool GpuMemoryBufferFactoryOzoneNativeBuffer::CreateGpuMemoryBuffer(
     gfx::GpuMemoryBuffer::Format format,
     gfx::GpuMemoryBuffer::Usage usage,
     int client_id,
-    gfx::PluginWindowHandle surface_handle) {
+    gfx::PluginWindowHandle surface_handle,
+    gfx::GpuMemoryBufferHandle* new_handle) {
   scoped_refptr<NativePixmap> pixmap =
       SurfaceFactoryOzone::GetInstance()->CreateNativePixmap(
           surface_handle, size, GetOzoneFormatFor(format),
-          GetOzoneUsageFor(usage));
+          GetOzoneUsageFor(usage), new_handle);
   if (!pixmap.get()) {
     LOG(ERROR) << "Failed to create pixmap " << size.width() << "x"
                << size.height() << " format " << format << ", usage " << usage;