Refactor guest view availability to be API not permission based.

chrome/browser/guest_view/web_view/web_view_constants.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 "chrome/browser/guest_view/web_view/web_view_constants.h"
 
 namespace webview {
 
 // Attributes.
 const char kAttributeAutoSize[] = "autosize";
 const char kAttributeMaxHeight[] = "maxheight";
 const char kAttributeMaxWidth[] = "maxwidth";
 const char kAttributeMinHeight[] = "minheight";
 const char kAttributeMinWidth[] = "minwidth";
 
+// API namespace.
+const char kAPINamespace[] = "webViewInternal";
+
 // Events.
 const char kEventClose[] = "webViewInternal.onClose";
 const char kEventConsoleMessage[] = "webViewInternal.onConsoleMessage";
 const char kEventContentLoad[] = "webViewInternal.onContentLoad";
 const char kEventContextMenu[] = "webViewInternal.contextmenu";
 const char kEventDialog[] = "webViewInternal.onDialog";
 const char kEventExit[] = "webViewInternal.onExit";
 const char kEventFindReply[] = "webViewInternal.onFindReply";
 const char kEventFrameNameChanged[] = "webViewInternal.onFrameNameChanged";
 const char kEventLoadAbort[] = "webViewInternal.onLoadAbort";
@@ skipping 73 matching lines @@
 
 // Miscellaneous.
 const char kMenuItemCommandId[] = "commandId";
 const char kMenuItemLabel[] = "label";
 const char kPersistPrefix[] = "persist:";
 const char kStoragePartitionId[] = "storagePartitionId";
 const unsigned int kMaxOutstandingPermissionRequests = 1024;
 const int kInvalidPermissionRequestID = 0;
 
 }  // namespace webview