[wasm] prototype for breakpoint support.

src/debug/debug.h

Index: src/debug/debug.h
diff --git a/src/debug/debug.h b/src/debug/debug.h
index eb2708c32f36ee802463e529b07fb57b2d171b54..8901146383591f02ecd55a70b65e0a25d0bb3183 100644
--- a/src/debug/debug.h
+++ b/src/debug/debug.h
@@ -20,6 +20,7 @@
 #include "src/runtime/runtime.h"
 #include "src/string-stream.h"
 #include "src/v8threads.h"
+#include "src/wasm/wasm-debug.h"
 
 #include "include/v8-debug.h"
 
@@ -68,8 +69,7 @@ class BreakLocation {
   // the address.
   static BreakLocation FromCodeOffset(Handle<DebugInfo> debug_info, int offset);
 
-  static BreakLocation FromFrame(Handle<DebugInfo> debug_info,
-                                 JavaScriptFrame* frame);
+  static BreakLocation FromFrame(StandardFrame* frame);
 
   static void AllForStatementPosition(Handle<DebugInfo> debug_info,
                                       int statement_position,
@@ -203,6 +203,24 @@ class BreakLocation {
     DISALLOW_COPY_AND_ASSIGN(BytecodeArrayIterator);
   };
 
+  class WasmBytecodeIterator : public Iterator {
+   public:
+    WasmBytecodeIterator(Handle<DebugInfo> debug_info, BreakLocatorType type);
+    ~WasmBytecodeIterator() override {}
+
+    BreakLocation GetBreakLocation() override;
+    bool Done() const override { return wasm_insn_iterator.Done(); }
+    void Next() override;
+    int code_offset() override { return position_; }
+
+   private:
+    wasm::WasmInstructionIterator wasm_insn_iterator;
+    BreakLocatorType break_locator_type_;
+    Handle<wasm::WasmDebugInfo> wasm_debug_info;
+    int func_index;
+    DISALLOW_COPY_AND_ASSIGN(WasmBytecodeIterator);
+  };
+
   static Iterator* GetIterator(Handle<DebugInfo> debug_info,
                                BreakLocatorType type = ALL_BREAK_LOCATIONS);
 
@@ -435,8 +453,8 @@ class Debug {
 
   // Internal logic
   bool Load();
-  void Break(JavaScriptFrame* frame);
-  void SetAfterBreakTarget(JavaScriptFrame* frame);
+  void Break(StandardFrame* frame);
+  void SetAfterBreakTarget(StandardFrame* frame);
 
   // Scripts handling.
   Handle<FixedArray> GetLoadedScripts();