Only skip operation on snapshot partitions

On Virtual A/B devices, don't skip SOURCE_COPY on
static partitions.

Test: update_engine_unittest
Test: incremental update to self
Change-Id: I5c93b501e09f50f559151eb77d83052373c90d0d

1 files changed, 6 insertions, 2 deletions

diff --git a/common/dynamic_partition_control_interface.h b/common/dynamic_partition_control_interface.h
index 39daf75c..c17bafbb 100644
--- a/common/dynamic_partition_control_interface.h
+++ b/common/dynamic_partition_control_interface.h
@@ -50,8 +50,12 @@ class DynamicPartitionControlInterface {
   // Return the feature flags of Virtual A/B on this device.
   virtual FeatureFlag GetVirtualAbFeatureFlag() = 0;
 
-  // Checks if the provided InstallOperation can be skipped on this device.
-  virtual bool ShouldSkipOperation(const InstallOperation& operation) = 0;
+  // Checks if |operation| can be skipped on the given partition.
+  // |partition_name| should not have the slot suffix; implementation of
+  // DynamicPartitionControlInterface checks partition at the target slot
+  // previously set with PreparePartitionsForUpdate().
+  virtual bool ShouldSkipOperation(const std::string& partition_name,
+                                   const InstallOperation& operation) = 0;
 
   // Do necessary cleanups before destroying the object.
   virtual void Cleanup() = 0;