PPAPI: Refactor renderer side of browser host creation

content/renderer/pepper/mock_renderer_ppapi_host.cc

Index: content/renderer/pepper/mock_renderer_ppapi_host.cc
diff --git a/content/renderer/pepper/mock_renderer_ppapi_host.cc b/content/renderer/pepper/mock_renderer_ppapi_host.cc
index 0f7b6e85573c45a8503b3c7c47a1444354908a8e..4ba96b7baf5b2cbbb4887e16bfa4e4d69a8219f8 100644
--- a/content/renderer/pepper/mock_renderer_ppapi_host.cc
+++ b/content/renderer/pepper/mock_renderer_ppapi_host.cc
@@ -5,6 +5,7 @@
 #include "content/renderer/pepper/mock_renderer_ppapi_host.h"
 
 #include "content/renderer/pepper/fake_pepper_plugin_instance.h"
+#include "ppapi/proxy/ppapi_messages.h"
 #include "ui/gfx/point.h"
 
 namespace content {
@@ -87,12 +88,14 @@ void MockRendererPpapiHost::SetToExternalPluginHost() {
   NOTIMPLEMENTED();
 }
 
-void MockRendererPpapiHost::CreateBrowserResourceHosts(
+int32_t MockRendererPpapiHost::CreateBrowserResourceHosts(
     PP_Instance instance,
     const std::vector<IPC::Message>& nested_msgs,
-    const base::Callback<void(const std::vector<int>&)>& callback) const {
-  callback.Run(std::vector<int>(nested_msgs.size(), 0));
-  return;
+    const ResourceHostCreationCallback& callback) const {
+  ppapi::proxy::CompletedBrowserResourceHosts dummy;
+  dummy.host_ids.resize(nested_msgs.size());
+  callback.Run(dummy);
+  return -1;
 }
 
 GURL MockRendererPpapiHost::GetDocumentURL(PP_Instance instance) const {