Refactor static context check in CREATE. (#6886)

* Refactor static context check in CREATE.

* Fix wasm.

ethcore/vm/src/ext.rs

@@ -35,9 +35,6 @@ pub enum ContractCreateResult {
 	/// Returned when contract creation failed.
 	/// VM doesn't have to know the reason.
 	Failed,
-	/// Returned when contract creation failed.
-	/// VM doesn't have to know the reason.
-	FailedInStaticCall,
 	/// Reverted with REVERT.
 	Reverted(U256, ReturnData),
 }

ethcore/vm/src/tests.rs

@@ -65,6 +65,7 @@ pub struct FakeExt {
 	pub schedule: Schedule,
 	pub balances: HashMap<Address, U256>,
 	pub tracing: bool,
+	pub is_static: bool,
 }
 
 // similar to the normal `finalize` function, but ignoring NeedsReturn.
@@ -192,7 +193,7 @@ impl Ext for FakeExt {
 	}
 
 	fn is_static(&self) -> bool {
-		false
+		self.is_static
 	}
 
 	fn inc_sstore_clears(&mut self) {