gpu: Keep original GMB alive to workaround problem with importing of UDL/EVDI buffers.

gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc

Index: gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc
diff --git a/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc b/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc
index e4de3983dc711f3cb9af0b60791645de06257727..4d233c6fbf688892c18f1206d8e64f4d099e4b6d 100644
--- a/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc
+++ b/gpu/ipc/service/gpu_memory_buffer_factory_ozone_native_pixmap.cc
@@ -42,9 +42,26 @@ GpuMemoryBufferFactoryOzoneNativePixmap::CreateGpuMemoryBuffer(
   new_handle.type = gfx::OZONE_NATIVE_PIXMAP;
   new_handle.id = id;
   new_handle.native_pixmap_handle = pixmap->ExportHandle();
+
+  // TODO(reveman): Remove this once crbug.com/628334 has been fixed.
+  {
+    base::AutoLock lock(native_pixmaps_lock_);
+    NativePixmapMapKey key(id.id, client_id);
+    DCHECK(native_pixmaps_.find(key) == native_pixmaps_.end());
+    native_pixmaps_[key] = pixmap;
+  }
+
   return new_handle;
 }
 
+void GpuMemoryBufferFactoryOzoneNativePixmap::DestroyGpuMemoryBuffer(
+    gfx::GpuMemoryBufferId id,
+    int client_id) {
+  base::AutoLock lock(native_pixmaps_lock_);
+  NativePixmapMapKey key(id.id, client_id);
+  native_pixmaps_.erase(key);
+}
+
 ImageFactory* GpuMemoryBufferFactoryOzoneNativePixmap::AsImageFactory() {
   return this;
 }