<webview>: Expose transparency API

content/common/browser_plugin/browser_plugin_constants.cc

 // Copyright 2013 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 "content/common/browser_plugin/browser_plugin_constants.h"
 
 namespace content {
 
 namespace browser_plugin {
 
@@ skipping 13 matching lines @@
 const char kMethodInternalAttach[] = "-internal-attach";
 const char kMethodInternalAttachWindowTo[] = "-internal-attachWindowTo";
 const char kMethodInternalTrackObjectLifetime[] =
     "-internal-trackObjectLifetime";
 
 // Internal events.
 const char kEventInternalInstanceIDAllocated[] = "instanceid-allocated";
 const char kEventInternalTrackedObjectGone[] = "trackedobjectgone";
 
 // Attributes.
+const char kAttributeAllowTransparency[] = "allowtransparency";
 const char kAttributeApi[] = "api";
 const char kAttributeAutoSize[] = "autosize";
 const char kAttributeContentWindow[] = "contentWindow";
 const char kAttributeMaxHeight[] = "maxheight";
 const char kAttributeMaxWidth[] = "maxwidth";
 const char kAttributeMinHeight[] = "minheight";
 const char kAttributeMinWidth[] = "minwidth";
 const char kAttributeName[] = "name";
 const char kAttributePartition[] = "partition";
 const char kAttributeSrc[] = "src";
@@ skipping 33 matching lines @@
     "Cannot remove partition attribute after navigating.";
 
 // Other.
 const char kBrowserPluginGuestManagerKeyName[] = "browser_plugin_guest_manager";
 const int kInstanceIDNone = 0;
 const int kInvalidPermissionRequestID = 0;
 
 }  // namespace browser_plugin
 
 }  // namespace content