Refactor BreakLocationIterator.

src/ppc/debug-ppc.cc

Index: src/ppc/debug-ppc.cc
diff --git a/src/ppc/debug-ppc.cc b/src/ppc/debug-ppc.cc
index f2c658ed697293b90b5f9f06b8c3262c9351b147..f59f6371de4f22d75dccc73ed25e1b2b6d814be5 100644
--- a/src/ppc/debug-ppc.cc
+++ b/src/ppc/debug-ppc.cc
@@ -12,12 +12,7 @@
 namespace v8 {
 namespace internal {
 
-bool BreakLocationIterator::IsDebugBreakAtReturn() {
-  return Debug::IsDebugBreakAtReturn(rinfo());
-}
-
-
-void BreakLocationIterator::SetDebugBreakAtReturn() {
+void BreakLocation::SetDebugBreakAtReturn() {
   // Patch the code changing the return from JS function sequence from
   //
   //   LeaveFrame
@@ -31,7 +26,7 @@ void BreakLocationIterator::SetDebugBreakAtReturn() {
   //   blrl
   //   bkpt
   //
-  CodePatcher patcher(rinfo()->pc(), Assembler::kJSReturnSequenceInstructions);
+  CodePatcher patcher(pc(), Assembler::kJSReturnSequenceInstructions);
   Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm());
   patcher.masm()->mov(
       v8::internal::r0,
@@ -45,29 +40,7 @@ void BreakLocationIterator::SetDebugBreakAtReturn() {
 }
 
 
-// Restore the JS frame exit code.
-void BreakLocationIterator::ClearDebugBreakAtReturn() {
-  rinfo()->PatchCode(original_rinfo()->pc(),
-                     Assembler::kJSReturnSequenceInstructions);
-}
-
-
-// A debug break in the frame exit code is identified by the JS frame exit code
-// having been patched with a call instruction.
-bool Debug::IsDebugBreakAtReturn(RelocInfo* rinfo) {
-  DCHECK(RelocInfo::IsJSReturn(rinfo->rmode()));
-  return rinfo->IsPatchedReturnSequence();
-}
-
-
-bool BreakLocationIterator::IsDebugBreakAtSlot() {
-  DCHECK(IsDebugBreakSlot());
-  // Check whether the debug break slot instructions have been patched.
-  return rinfo()->IsPatchedDebugBreakSlotSequence();
-}
-
-
-void BreakLocationIterator::SetDebugBreakAtSlot() {
+void BreakLocation::SetDebugBreakAtSlot() {
   DCHECK(IsDebugBreakSlot());
   // Patch the code changing the debug break slot code from
   //
@@ -83,7 +56,7 @@ void BreakLocationIterator::SetDebugBreakAtSlot() {
   //   mtlr r0
   //   blrl
   //
-  CodePatcher patcher(rinfo()->pc(), Assembler::kDebugBreakSlotInstructions);
+  CodePatcher patcher(pc(), Assembler::kDebugBreakSlotInstructions);
   Assembler::BlockTrampolinePoolScope block_trampoline_pool(patcher.masm());
   patcher.masm()->mov(
       v8::internal::r0,
@@ -94,13 +67,6 @@ void BreakLocationIterator::SetDebugBreakAtSlot() {
 }
 
 
-void BreakLocationIterator::ClearDebugBreakAtSlot() {
-  DCHECK(IsDebugBreakSlot());
-  rinfo()->PatchCode(original_rinfo()->pc(),
-                     Assembler::kDebugBreakSlotInstructions);
-}
-
-
 #define __ ACCESS_MASM(masm)