Implement PPAPI proxied IsInstanceOf

BUG=None
TEST=use pp::VarPrivate.AsScriptableObject in out-of-process pepper plugin


Review URL: http://codereview.chromium.org/8476004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@108746 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 28 insertions, 1 deletions

diff --git a/ppapi/proxy/ppb_var_deprecated_proxy.cc b/ppapi/proxy/ppb_var_deprecated_proxy.cc
index 9fd3a6c..2594d26 100644
--- a/ppapi/proxy/ppb_var_deprecated_proxy.cc
+++ b/ppapi/proxy/ppb_var_deprecated_proxy.cc
@@ -499,7 +499,11 @@ void PPB_Var_Deprecated_Proxy::OnMsgIsInstanceOfDeprecated(
     int64 ppp_class,
     int64* ppp_class_data,
     PP_Bool* result) {
-  // TODO(brettw) write this.
+  SetAllowPluginReentrancy();
+  *result = PPP_Class_Proxy::IsInstanceOf(ppb_var_impl_,
+                                          var.Get(dispatcher()),
+                                          ppp_class,
+                                          ppp_class_data);
 }
 
 void PPB_Var_Deprecated_Proxy::OnMsgCreateObjectDeprecated(
diff --git a/ppapi/proxy/ppp_class_proxy.cc b/ppapi/proxy/ppp_class_proxy.cc
index a26bd81..0ff8973 100644
--- a/ppapi/proxy/ppp_class_proxy.cc
+++ b/ppapi/proxy/ppp_class_proxy.cc
@@ -197,6 +197,24 @@ PP_Var PPP_Class_Proxy::CreateProxiedObject(const PPB_Var_Deprecated* var,
   return var->CreateObject(module_id, &class_interface, object_proxy);
 }
 
+// static
+PP_Bool PPP_Class_Proxy::IsInstanceOf(const PPB_Var_Deprecated* ppb_var_impl,
+                                      const PP_Var& var,
+                                      int64 ppp_class,
+                                      int64* ppp_class_data) {
+  void* proxied_object = NULL;
+  if (ppb_var_impl->IsInstanceOf(var,
+                                 &class_interface,
+                                 &proxied_object)) {
+    if (static_cast<ObjectProxy*>(proxied_object)->ppp_class == ppp_class) {
+      DCHECK(ppp_class_data);
+      *ppp_class_data = static_cast<ObjectProxy*>(proxied_object)->user_data;
+      return PP_TRUE;
+    }
+  }
+  return PP_FALSE;
+}
+
 bool PPP_Class_Proxy::OnMessageReceived(const IPC::Message& msg) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(PPP_Class_Proxy, msg)
diff --git a/ppapi/proxy/ppp_class_proxy.h b/ppapi/proxy/ppp_class_proxy.h
index 299c3ec..d38716d 100644
--- a/ppapi/proxy/ppp_class_proxy.h
+++ b/ppapi/proxy/ppp_class_proxy.h
@@ -43,6 +43,11 @@ class PPP_Class_Proxy : public InterfaceProxy {
                                     int64 ppp_class,
                                     int64 class_data);
 
+  static PP_Bool IsInstanceOf(const PPB_Var_Deprecated* ppb_var_impl,
+                              const PP_Var& var,
+                              int64 ppp_class,
+                              int64* ppp_class_data);
+
   // InterfaceProxy implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);