Re-land: Reimplement automation API on top of C++-backed AXTree.

extensions/renderer/script_context.h

 // 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.
 
 #ifndef EXTENSIONS_RENDERER_SCRIPT_CONTEXT_H_
 #define EXTENSIONS_RENDERER_SCRIPT_CONTEXT_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 160 matching lines @@
   bool HasAPIPermission(APIPermission::ID permission) const;
 
   // Throws an Error in this context's JavaScript context, if this context does
   // not have access to |name|. Returns true if this context has access (i.e.
   // no exception thrown), false if it does not (i.e. an exception was thrown).
   bool HasAccessOrThrowError(const std::string& name);
 
   // Returns a string representation of this ScriptContext, for debugging.
   std::string GetDebugString() const;
 
+  // Gets the current stack trace as a multi-line string to be logged.
+  std::string GetStackTraceAsString() const;
+
  private:
   class Runner;
 
   // Whether this context is valid.
   bool is_valid_;
 
   // The v8 context the bindings are accessible to.
   v8::Global<v8::Context> v8_context_;
 
   // The WebLocalFrame associated with this context. This can be NULL because
@@ skipping 33 matching lines @@
   GURL url_;
 
   scoped_ptr<Runner> runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ScriptContext);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_SCRIPT_CONTEXT_H_