gpu: introduce glCopySubTextureCHROMIUM

cc/resources/resource_provider.cc

Index: cc/resources/resource_provider.cc
diff --git a/cc/resources/resource_provider.cc b/cc/resources/resource_provider.cc
index 38f79fb9fd4f2e3ef9a2ac32c8eed13eecd1442d..856e99d1011a68d613a8f2357fe1cee833350a93 100644
--- a/cc/resources/resource_provider.cc
+++ b/cc/resources/resource_provider.cc
@@ -2090,12 +2090,8 @@ void ResourceProvider::CopyResource(ResourceId source_id, ResourceId dest_id) {
   }
   DCHECK(!dest_resource->image_id);
   dest_resource->allocated = true;
-  gl->CopyTextureCHROMIUM(dest_resource->target,
-                          source_resource->gl_id,
-                          dest_resource->gl_id,
-                          0,
-                          GLInternalFormat(dest_resource->format),
-                          GLDataType(dest_resource->format));
+  gl->CopySubTextureCHROMIUM(dest_resource->target, source_resource->gl_id,
+                             dest_resource->gl_id, 0, 0, 0);
   if (source_resource->gl_read_lock_query_id) {
     // End query and create a read lock fence that will prevent access to
     // source resource until CopyTextureCHROMIUM command has completed.