Fix pubsub new_blocks notifications to include all blocks (#9987)

Fix: new blocks notifications sometimes missing in pubsub RPC

Implement new struct to pass to `new_blocks()` with extra parameter - `has_more_blocks_to_import`, which was previously used to determine whether the notification should be sent. Now it's up to each implementation to decide what to do.

Updated all implementations to behave as before, except `eth_pubsub`, which will send notification even when the queue is not empty.

Update tests.

ethcore/sync/src/api.rs

@@ -29,7 +29,7 @@ use types::pruning_info::PruningInfo;
 use ethereum_types::{H256, H512, U256};
 use io::{TimerToken};
 use ethcore::ethstore::ethkey::Secret;
-use ethcore::client::{BlockChainClient, ChainNotify, ChainRoute, ChainMessageType};
+use ethcore::client::{BlockChainClient, ChainNotify, NewBlocks, ChainMessageType};
 use ethcore::snapshot::SnapshotService;
 use ethcore::header::BlockNumber;
 use sync_io::NetSyncIo;
@@ -498,14 +498,9 @@ impl ChainNotify for EthSync {
 		}
 	}
 
-	fn new_blocks(&self,
-		imported: Vec<H256>,
-		invalid: Vec<H256>,
-		route: ChainRoute,
-		sealed: Vec<H256>,
-		proposed: Vec<Bytes>,
-		_duration: Duration)
+	fn new_blocks(&self, new_blocks: NewBlocks)
 	{
+		if new_blocks.has_more_blocks_to_import { return }
 		use light::net::Announcement;
 
 		self.network.with_context(self.subprotocol_name, |context| {
@@ -513,12 +508,12 @@ impl ChainNotify for EthSync {
 				&self.eth_handler.overlay);
 			self.eth_handler.sync.write().chain_new_blocks(
 				&mut sync_io,
-				&imported,
-				&invalid,
-				route.enacted(),
-				route.retracted(),
-				&sealed,
-				&proposed);
+				&new_blocks.imported,
+				&new_blocks.invalid,
+				new_blocks.route.enacted(),
+				new_blocks.route.retracted(),
+				&new_blocks.sealed,
+				&new_blocks.proposed);
 		});
 
 		self.network.with_context(self.light_subprotocol_name, |context| {