VM: Set breakpoints on x64 and arm64 without patching code.

runtime/vm/assembler_x64.cc

Index: runtime/vm/assembler_x64.cc
diff --git a/runtime/vm/assembler_x64.cc b/runtime/vm/assembler_x64.cc
index 40cb2cf736707c9bc914748476e9a74433363a65..45a0754cde9852e760755f48f93c902e2061bc8f 100644
--- a/runtime/vm/assembler_x64.cc
+++ b/runtime/vm/assembler_x64.cc
@@ -57,29 +57,6 @@ Assembler::Assembler(bool use_far_branches)
     } else {
       object_pool_.AddObject(vacant, kNotPatchable);
     }
-
-    // Create fixed object pool entries for debugger stubs.
-    if (stub_code->ICCallBreakpoint_entry() != NULL) {
-      index = object_pool_.AddExternalLabel(
-          &stub_code->ICCallBreakpointLabel(), kNotPatchable);
-      ASSERT(index == kICCallBreakpointCPIndex);
-    } else {
-      object_pool_.AddObject(vacant, kNotPatchable);
-    }
-    if (stub_code->ClosureCallBreakpoint_entry() != NULL) {
-      index = object_pool_.AddExternalLabel(
-          &stub_code->ClosureCallBreakpointLabel(), kNotPatchable);
-      ASSERT(index == kClosureCallBreakpointCPIndex);
-    } else {
-      object_pool_.AddObject(vacant, kNotPatchable);
-    }
-    if (stub_code->RuntimeCallBreakpoint_entry() != NULL) {
-      index = object_pool_.AddExternalLabel(
-          &stub_code->RuntimeCallBreakpointLabel(), kNotPatchable);
-      ASSERT(index == kRuntimeCallBreakpointCPIndex);
-    } else {
-      object_pool_.AddObject(vacant, kNotPatchable);
-    }
   }
 }