Add plugin placeholder and policy support (issue #1708)

- Default plugin loading policy can be specified using the new
  `--plugin-policy=[allow|block|detect]` command-line flag.
- Move CefRequestHandler::OnBeforePluginLoad to
  CefRequestContextHandler and add a new policy argument that
  supports different actions (allow, block, detect, disable) on a
  per-plugin-instance basis.
- Add CefContextMenuHandler::RunContextMenu for providing a custom
  context menu implementation.
- Add CefResourceBundleHandler::GetDataResourceForScale for
  returning scaled resources (issue #1272).
- Add CefResourceBundle for retrieving resources from the resource
  bundle (*.pak) files loaded by CEF during startup or via the
  CefResourceBundleHandler.
- Linux: Fix Debug build IO access warning with CefGetMimeType.
- cef_unittests: Move the refcounting implementation from TestHandler
  to subclasses in order to support interface inheritance from
  subclasses.

libcef_dll/ctocpp/resource_bundle_ctocpp.cc

@@ -0,0 +1,104 @@
+// Copyright (c) 2015 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+//
+// ---------------------------------------------------------------------------
+//
+// This file was generated by the CEF translator tool. If making changes by
+// hand only do so within the body of existing method and function
+// implementations. See the translator.README.txt file in the tools directory
+// for more information.
+//
+
+#include "libcef_dll/ctocpp/resource_bundle_ctocpp.h"
+
+
+// STATIC METHODS - Body may be edited by hand.
+
+CefRefPtr<CefResourceBundle> CefResourceBundle::GetGlobal() {
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  cef_resource_bundle_t* _retval = cef_resource_bundle_get_global();
+
+  // Return type: refptr_same
+  return CefResourceBundleCToCpp::Wrap(_retval);
+}
+
+
+// VIRTUAL METHODS - Body may be edited by hand.
+
+CefString CefResourceBundleCToCpp::GetLocalizedString(int string_id) {
+  cef_resource_bundle_t* _struct = GetStruct();
+  if (CEF_MEMBER_MISSING(_struct, get_localized_string))
+    return CefString();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  cef_string_userfree_t _retval = _struct->get_localized_string(_struct,
+      string_id);
+
+  // Return type: string
+  CefString _retvalStr;
+  _retvalStr.AttachToUserFree(_retval);
+  return _retvalStr;
+}
+
+bool CefResourceBundleCToCpp::GetDataResource(int resource_id, void*& data,
+    size_t& data_size) {
+  cef_resource_bundle_t* _struct = GetStruct();
+  if (CEF_MEMBER_MISSING(_struct, get_data_resource))
+    return false;
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  int _retval = _struct->get_data_resource(_struct,
+      resource_id,
+      &data,
+      &data_size);
+
+  // Return type: bool
+  return _retval?true:false;
+}
+
+bool CefResourceBundleCToCpp::GetDataResourceForScale(int resource_id,
+    ScaleFactor scale_factor, void*& data, size_t& data_size) {
+  cef_resource_bundle_t* _struct = GetStruct();
+  if (CEF_MEMBER_MISSING(_struct, get_data_resource_for_scale))
+    return false;
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  int _retval = _struct->get_data_resource_for_scale(_struct,
+      resource_id,
+      scale_factor,
+      &data,
+      &data_size);
+
+  // Return type: bool
+  return _retval?true:false;
+}
+
+
+// CONSTRUCTOR - Do not edit by hand.
+
+CefResourceBundleCToCpp::CefResourceBundleCToCpp() {
+}
+
+template<> cef_resource_bundle_t* CefCToCpp<CefResourceBundleCToCpp,
+    CefResourceBundle, cef_resource_bundle_t>::UnwrapDerived(
+    CefWrapperType type, CefResourceBundle* c) {
+  NOTREACHED() << "Unexpected class type: " << type;
+  return NULL;
+}
+
+#ifndef NDEBUG
+template<> base::AtomicRefCount CefCToCpp<CefResourceBundleCToCpp,
+    CefResourceBundle, cef_resource_bundle_t>::DebugObjCt = 0;
+#endif
+
+template<> CefWrapperType CefCToCpp<CefResourceBundleCToCpp, CefResourceBundle,
+    cef_resource_bundle_t>::kWrapperType = WT_RESOURCE_BUNDLE;