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

extensions/renderer/logging_native_handler.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "extensions/renderer/logging_native_handler.h"
+
 #include "base/logging.h"
 #include "base/strings/stringprintf.h"
-#include "extensions/renderer/logging_native_handler.h"
-#include "extensions/renderer/script_context.h"
 
 namespace extensions {
 
 LoggingNativeHandler::LoggingNativeHandler(ScriptContext* context)
     : ObjectBackedNativeHandler(context) {
   RouteFunction(
       "DCHECK",
       base::Bind(&LoggingNativeHandler::Dcheck, base::Unretained(this)));
   RouteFunction(
       "CHECK",
@@ skipping 46 matching lines @@
 void LoggingNativeHandler::ParseArgs(
     const v8::FunctionCallbackInfo<v8::Value>& args,
     bool* check_value,
     std::string* error_message) {
   CHECK_LE(args.Length(), 2);
   *check_value = args[0]->BooleanValue();
   if (args.Length() == 2) {
     *error_message = "Error: " + std::string(*v8::String::Utf8Value(args[1]));
   }
 
-  *error_message += "\n" + context()->GetStackTraceAsString();
+  v8::Local<v8::StackTrace> stack_trace =
+      v8::StackTrace::CurrentStackTrace(args.GetIsolate(), 10);
+  if (stack_trace.IsEmpty() || stack_trace->GetFrameCount() <= 0) {
+    *error_message += "\n    <no stack trace>";
+  } else {
+    for (size_t i = 0; i < (size_t)stack_trace->GetFrameCount(); ++i) {
+      v8::Local<v8::StackFrame> frame = stack_trace->GetFrame(i);
+      CHECK(!frame.IsEmpty());
+      *error_message += base::StringPrintf(
+          "\n    at %s (%s:%d:%d)",
+          ToStringOrDefault(frame->GetFunctionName(), "<anonymous>").c_str(),
+          ToStringOrDefault(frame->GetScriptName(), "<anonymous>").c_str(),
+          frame->GetLineNumber(),
+          frame->GetColumn());
+    }
+  }
+}
+
+std::string LoggingNativeHandler::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 extensions