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

content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc

Index: content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
index e7ebdcff57c14d1fabe62f9c697b0c52cecb499c..f1e212025c546a70cdad4ae95c106cbb5ffe7c5d 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc
@@ -29,19 +29,22 @@ GpuMemoryBufferImplOzoneNativePixmap::CreateFromHandle(
     const DestructionCallback& callback) {
   scoped_ptr<ui::ClientNativePixmap> native_pixmap =
       ui::ClientNativePixmapFactory::GetInstance()->ImportFromHandle(
-          handle.native_pixmap_handle, size, format, usage);
+          handle.native_pixmap_handle, size, usage);
   DCHECK(native_pixmap);
-  return make_scoped_ptr(
-      new GpuMemoryBufferImplOzoneNativePixmap(handle.id, size, format,
-                                               callback, native_pixmap.Pass()));
+  return make_scoped_ptr(new GpuMemoryBufferImplOzoneNativePixmap(
+      handle.id, size, format, callback, native_pixmap.Pass()));
 }
 
 bool GpuMemoryBufferImplOzoneNativePixmap::Map(void** data) {
-  return pixmap_->Map(data);
+  *data = pixmap_->Map();
+  mapped_ = !!(*data);

[reveman, 2015/08/19 13:18:11]

nit: mapped_ = true; and remove the DCHECK below as pixmap_->Map() is not
allowed to return null.

[dshwang, 2015/08/19 13:23:20]

Done.

+  DCHECK(mapped_);
+  return mapped_;
 }
 
 void GpuMemoryBufferImplOzoneNativePixmap::Unmap() {
   pixmap_->Unmap();
+  mapped_ = false;
 }
 
 void GpuMemoryBufferImplOzoneNativePixmap::GetStride(int* stride) const {