Revert of Reimplement automation API on top of C++-backed AXTree.

extensions/renderer/script_context.cc

Index: extensions/renderer/script_context.cc
diff --git a/extensions/renderer/script_context.cc b/extensions/renderer/script_context.cc
index e6dcfe589112cb26fceda916b1c074589fcf53a6..32222b0ca065128032dc5142f1401c19ba208368 100644
--- a/extensions/renderer/script_context.cc
+++ b/extensions/renderer/script_context.cc
@@ -59,15 +59,6 @@
   return std::string();
 }
 
-static std::string ToStringOrDefault(
-    const v8::Local<v8::String>& v8_string,
-    const std::string& dflt) {
-  if (v8_string.IsEmpty())
-    return dflt;
-  std::string ascii_value = *v8::String::Utf8Value(v8_string);
-  return ascii_value.empty() ? dflt : ascii_value;
-}
-
 }  // namespace
 
 // A gin::Runner that delegates to its ScriptContext.
@@ -389,27 +380,6 @@
       GetEffectiveContextTypeDescription().c_str());
 }
 
-std::string ScriptContext::GetStackTraceAsString() const {
-  v8::Local<v8::StackTrace> stack_trace =
-      v8::StackTrace::CurrentStackTrace(isolate(), 10);
-  if (stack_trace.IsEmpty() || stack_trace->GetFrameCount() <= 0) {
-    return "    <no stack trace>";
-  } else {
-    std::string result;
-    for (int i = 0; i < stack_trace->GetFrameCount(); ++i) {
-      v8::Local<v8::StackFrame> frame = stack_trace->GetFrame(i);
-      CHECK(!frame.IsEmpty());
-      result += base::StringPrintf(
-          "\n    at %s (%s:%d:%d)",
-          ToStringOrDefault(frame->GetFunctionName(), "<anonymous>").c_str(),
-          ToStringOrDefault(frame->GetScriptName(), "<anonymous>").c_str(),
-          frame->GetLineNumber(),
-          frame->GetColumn());
-    }
-    return result;
-  }
-}
-
 ScriptContext::Runner::Runner(ScriptContext* context) : context_(context) {
 }