Create an extensions_renderer target

This moves a small group of source files from
//chrome/renderer/extensions to //extensions/renderer and
establishes a new extensions_renderer target based on
sources there.

BUG=359154
TBR=jochen@chromium.org for v8 DEPS copy to //extensions
TBR=sky@chromium.org for chrome/test mechanical change

Review URL: https://codereview.chromium.org/223393002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@261908 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 46 insertions, 0 deletions

diff --git a/extensions/renderer/native_handler.h b/extensions/renderer/native_handler.h
new file mode 100644
index 0000000..c0660c8
--- /dev/null
+++ b/extensions/renderer/native_handler.h
@@ -0,0 +1,46 @@
+// 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_NATIVE_HANDLER_H_
+#define EXTENSIONS_RENDERER_NATIVE_HANDLER_H_
+
+#include "base/basictypes.h"
+#include "v8/include/v8.h"
+
+namespace extensions {
+
+// NativeHandlers are intended to be used with a ModuleSystem. The ModuleSystem
+// will assume ownership of the NativeHandler, and as a ModuleSystem is tied to
+// a single v8::Context, this implies that NativeHandlers will also be tied to
+// a single v8::Context.
+// TODO(koz): Rename this to NativeJavaScriptModule.
+class NativeHandler {
+ public:
+  NativeHandler();
+  virtual ~NativeHandler();
+
+  // Create a new instance of the object this handler specifies.
+  virtual v8::Handle<v8::Object> NewInstance() = 0;
+
+  // Invalidate this object so it cannot be used any more. This is needed
+  // because it's possible for this to outlive its owner context. Invalidate
+  // must be called before this happens.
+  //
+  // Subclasses should override to invalidate their own V8 state. If they do
+  // they must call their superclass' Invalidate().
+  virtual void Invalidate();
+
+ protected:
+  // Allow subclasses to query valid state.
+  bool is_valid() { return is_valid_; }
+
+ private:
+  bool is_valid_;
+
+  DISALLOW_COPY_AND_ASSIGN(NativeHandler);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_RENDERER_NATIVE_HANDLER_H_