Lazy deopt without code patching.

runtime/vm/flow_graph_compiler_arm.cc

Index: runtime/vm/flow_graph_compiler_arm.cc
diff --git a/runtime/vm/flow_graph_compiler_arm.cc b/runtime/vm/flow_graph_compiler_arm.cc
index 0b7fd3d71624f7781be06fc5ae2e8982ff1f5e7e..b5e5154cad8ac1d21805c62b4bfd738f4234cc82 100644
--- a/runtime/vm/flow_graph_compiler_arm.cc
+++ b/runtime/vm/flow_graph_compiler_arm.cc
@@ -1124,21 +1124,6 @@ void FlowGraphCompiler::CompileGraph() {
   __ bkpt(0);
   ASSERT(assembler()->constant_pool_allowed());
   GenerateDeferredCode();
-
-  BeginCodeSourceRange();
-  if (is_optimizing() && !FLAG_precompiled_mode) {
-    // Leave enough space for patching in case of lazy deoptimization.
-    for (intptr_t i = 0;
-         i < CallPattern::DeoptCallPatternLengthInInstructions();
-         ++i) {
-      __ nop();
-    }
-    lazy_deopt_return_pc_offset_ = assembler()->CodeSize();
-    __ Branch(*StubCode::DeoptimizeLazyFromReturn_entry());
-    lazy_deopt_throw_pc_offset_ = assembler()->CodeSize();
-    __ Branch(*StubCode::DeoptimizeLazyFromThrow_entry());
-  }
-  EndCodeSourceRange(TokenPosition::kDartCodeEpilogue);
 }