Rename assembler field/getter/setter allow_constant_pool to constant_pool_allowed

runtime/vm/flow_graph_compiler_arm64.cc

Index: runtime/vm/flow_graph_compiler_arm64.cc
diff --git a/runtime/vm/flow_graph_compiler_arm64.cc b/runtime/vm/flow_graph_compiler_arm64.cc
index f951807a88d3c8a0340603702d5871428833540b..bd7ace098cdc7cdf3eef1c76c1164d4459dcdaed 100644
--- a/runtime/vm/flow_graph_compiler_arm64.cc
+++ b/runtime/vm/flow_graph_compiler_arm64.cc
@@ -64,14 +64,14 @@ bool FlowGraphCompiler::SupportsHardwareDivision() {
 void FlowGraphCompiler::EnterIntrinsicMode() {
   ASSERT(!intrinsic_mode());
   intrinsic_mode_ = true;
-  assembler()->set_allow_constant_pool(false);
+  assembler()->set_constant_pool_allowed(false);
 }
 
 
 void FlowGraphCompiler::ExitIntrinsicMode() {
   ASSERT(intrinsic_mode());
   intrinsic_mode_ = false;
-  assembler()->set_allow_constant_pool(true);
+  assembler()->set_constant_pool_allowed(true);
 }