Add GetLiveVars to PPB_Testing_Dev. Fix leaks it uncovered.

ppapi/proxy/ppb_testing_proxy.cc

 // Copyright (c) 2011 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 "ppapi/proxy/ppb_testing_proxy.h"
 
 #include "base/message_loop.h"
 #include "ppapi/c/dev/ppb_testing_dev.h"
 #include "ppapi/proxy/enter_proxy.h"
 #include "ppapi/proxy/plugin_dispatcher.h"
@@ skipping 77 matching lines @@
       API_ID_PPB_TESTING, instance_id, input_event_data));
 }
 
 PP_Var GetDocumentURL(PP_Instance instance, PP_URLComponents_Dev* components) {
   EnterInstance enter(instance);
   if (enter.failed())
     return PP_MakeUndefined();
   return enter.functions()->GetDocumentURL(instance, components);
 }
 
+// TODO(dmichael): Ideally we could get a way to check the number of vars in the
+// host-side tracker when running out-of-process, to make sure the proxy does
+// not leak host-side vars.
+uint32_t GetLiveVars(PP_Var live_vars[], uint32_t array_size) {
+  std::vector<PP_Var> vars =
+      PpapiGlobals::Get()->GetVarTracker()->GetLiveVars();
+  for (size_t i = 0u;
+       i < std::min(static_cast<size_t>(array_size), vars.size());
+       ++i)
+    live_vars[i] = vars[i];
+  return vars.size();
+}
+
 const PPB_Testing_Dev testing_interface = {
   &ReadImageData,
   &RunMessageLoop,
   &QuitMessageLoop,
   &GetLiveObjectsForInstance,
   &IsOutOfProcess,
   &SimulateInputEvent,
-  &GetDocumentURL
+  &GetDocumentURL,
+  &GetLiveVars
 };
 
 InterfaceProxy* CreateTestingProxy(Dispatcher* dispatcher) {
   return new PPB_Testing_Proxy(dispatcher);
 }
 
 }  // namespace
 
 PPB_Testing_Proxy::PPB_Testing_Proxy(Dispatcher* dispatcher)
     : InterfaceProxy(dispatcher),
@@ skipping 61 matching lines @@
   scoped_refptr<PPB_InputEvent_Shared> input_event_impl(
       new PPB_InputEvent_Shared(PPB_InputEvent_Shared::InitAsProxy(),
                                 instance,
                                 input_event));
   ppb_testing_impl_->SimulateInputEvent(instance,
                                         input_event_impl->pp_resource());
 }
 
 }  // namespace proxy
 }  // namespace ppapi