Browser Plugin: Add HTML5-like postMessage support

content/renderer/browser_plugin/browser_plugin_bindings.cc

Index: content/renderer/browser_plugin/browser_plugin_bindings.cc
diff --git a/content/renderer/browser_plugin/browser_plugin_bindings.cc b/content/renderer/browser_plugin/browser_plugin_bindings.cc
index bf948525ceeb166fd3fa699fa72a7f225e5c0fee..b0dfca7c707127617103d124c13298cfbf8b7d2b 100644
--- a/content/renderer/browser_plugin/browser_plugin_bindings.cc
+++ b/content/renderer/browser_plugin/browser_plugin_bindings.cc
@@ -41,6 +41,7 @@ const char kAddEventListener[] = "addEventListener";
 const char kBackMethod[] = "back";
 const char kCanGoBack[] = "canGoBack";
 const char kCanGoForward[] = "canGoForward";
+const char kContentWindow[] = "contentWindow";
 const char kForwardMethod[] = "forward";
 const char kGetProcessId[] = "getProcessId";
 const char kGoMethod[] = "go";
@@ -56,6 +57,10 @@ BrowserPluginBindings* GetBindings(NPObject* object) {
       message_channel;
 }
 
+bool IdentifierIsContentWindow(NPIdentifier identifier) {
+  return WebBindings::getStringIdentifier(kContentWindow) == identifier;
+}
+
 bool IdentifierIsPartitionAttribute(NPIdentifier identifier) {
   return WebBindings::getStringIdentifier(kPartitionAttribute) == identifier;
 }
@@ -141,6 +146,7 @@ bool BrowserPluginBindingsInvokeDefault(NPObject* np_obj,
 
 bool BrowserPluginBindingsHasProperty(NPObject* np_obj, NPIdentifier name) {
   return IdentifierIsSrcAttribute(name) ||
+      IdentifierIsContentWindow(name) ||
       IdentifierIsPartitionAttribute(name);
 }
 
@@ -163,6 +169,15 @@ bool BrowserPluginBindingsGetProperty(NPObject* np_obj, NPIdentifier name,
     return StringToNPVariant(src, result);
   }
 
+  if (IdentifierIsContentWindow(name)) {
+    NPObject* obj = bindings->instance()->GetContentWindow();
+    if (obj) {
+      result->type = NPVariantType_Object;
+      result->value.objectValue = WebBindings::retainObject(obj);
+    }
+    return true;
+  }
+
   if (IdentifierIsPartitionAttribute(name)) {
     std::string partition_id = bindings->instance()->GetPartitionAttribute();
     return StringToNPVariant(partition_id, result);