Add PepperTryCatch and V8ObjectVar classes

content/renderer/pepper/pepper_plugin_instance_impl.cc

Index: content/renderer/pepper/pepper_plugin_instance_impl.cc
diff --git a/content/renderer/pepper/pepper_plugin_instance_impl.cc b/content/renderer/pepper/pepper_plugin_instance_impl.cc
index a1116811924e0ad9789ef791752b8a1de7341d0c..3457cff6626113d235f3e77fc9f67882e513af77 100644
--- a/content/renderer/pepper/pepper_plugin_instance_impl.cc
+++ b/content/renderer/pepper/pepper_plugin_instance_impl.cc
@@ -661,6 +661,15 @@ PepperPluginInstanceImpl::~PepperPluginInstanceImpl() {
 // If a method needs to access a member of the instance after the call has
 // returned, then it needs to keep its own reference on the stack.
 
+v8::Local<v8::Context> PepperPluginInstanceImpl::GetContext() {
+  if (!container_)
+    return v8::Handle<v8::Context>();
+  v8::Handle<v8::Context> context =
+      container_->element().document().frame()->mainWorldScriptContext();

[dmichael (off chromium), 2014/07/30 19:34:13]

The frame can be NULL in rare cases, so please check that and return a null
Context in that case.

[raymes, 2014/08/06 03:22:52]

Done.

+  DCHECK(context->GetIsolate() == isolate_);
+  return context;
+}
+
 void PepperPluginInstanceImpl::Delete() {
   is_deleted_ = true;