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

runtime/vm/assembler_arm64.cc

Index: runtime/vm/assembler_arm64.cc
diff --git a/runtime/vm/assembler_arm64.cc b/runtime/vm/assembler_arm64.cc
index ef4007f88283e95f968cf393fb0d132be5e9f7c2..003e5dfa21471f3cc5483994d6ac70e7859ea091 100644
--- a/runtime/vm/assembler_arm64.cc
+++ b/runtime/vm/assembler_arm64.cc
@@ -59,30 +59,6 @@ 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) {
-      intptr_t index =
-          object_pool_.AddExternalLabel(&stub_code->ICCallBreakpointLabel(),
-                                        kNotPatchable);
-      ASSERT(index == kICCallBreakpointCPIndex);
-    } else {
-      object_pool_.AddObject(vacant, kNotPatchable);
-    }
-    if (stub_code->ClosureCallBreakpoint_entry() != NULL) {
-      intptr_t index = object_pool_.AddExternalLabel(
-          &stub_code->ClosureCallBreakpointLabel(), kNotPatchable);
-      ASSERT(index == kClosureCallBreakpointCPIndex);
-    } else {
-      object_pool_.AddObject(vacant, kNotPatchable);
-    }
-    if (stub_code->RuntimeCallBreakpoint_entry() != NULL) {
-      intptr_t index = object_pool_.AddExternalLabel(
-          &stub_code->RuntimeCallBreakpointLabel(), kNotPatchable);
-      ASSERT(index == kRuntimeCallBreakpointCPIndex);
-    } else {
-      object_pool_.AddObject(vacant, kNotPatchable);
-    }
   }
 }