[inspector] migrate set/remove BreakPoint to debug-interface.h

src/inspector/v8-debugger-script.h

Index: src/inspector/v8-debugger-script.h
diff --git a/src/inspector/v8-debugger-script.h b/src/inspector/v8-debugger-script.h
index 9250c9d87291a3dbe3771b43ff21d7991d409931..81edd3c6ab2c9f8d4faa58d89f8a9ab5e7d3f680 100644
--- a/src/inspector/v8-debugger-script.h
+++ b/src/inspector/v8-debugger-script.h
@@ -80,7 +80,13 @@ class V8DebuggerScript {
       std::vector<v8::debug::Location>* locations) = 0;
   virtual void resetBlackboxedStateCache() = 0;
 
+  v8::debug::Location setBreakpoint(
+      const v8::debug::Location& location,
+      v8::Local<v8::debug::BreakPoint> breakPoint);
+
  protected:
+  virtual v8::Local<v8::debug::Script> script() = 0;
+
   V8DebuggerScript(v8::Isolate*, String16 id, String16 url);
 
   String16 m_id;