Added the infrastructure for surfaceProxy.onResize() and SurfaceView.onResize()

extensions/renderer/guest_view/extensions_guest_view_container.cc

Index: extensions/renderer/guest_view/extensions_guest_view_container.cc
diff --git a/extensions/renderer/guest_view/extensions_guest_view_container.cc b/extensions/renderer/guest_view/extensions_guest_view_container.cc
index c546c3a407f5775b35fef57e14e775900b970481..3a5359f922699bf80f2cb9afff93182921920cac 100644
--- a/extensions/renderer/guest_view/extensions_guest_view_container.cc
+++ b/extensions/renderer/guest_view/extensions_guest_view_container.cc
@@ -147,7 +147,8 @@ ExtensionsGuestViewContainer::ExtensionsGuestViewContainer(
     content::RenderFrame* render_frame)
     : GuestViewContainer(render_frame),
       ready_(false),
-      destruction_isolate_(nullptr) {
+      destruction_isolate_(nullptr),
+      element_resize_isolate_(nullptr) {
 }
 
 ExtensionsGuestViewContainer::~ExtensionsGuestViewContainer() {
@@ -168,7 +169,7 @@ ExtensionsGuestViewContainer::~ExtensionsGuestViewContainer() {
   v8::Context::Scope context_scope(context);
   blink::WebScopedMicrotaskSuppression suppression;
 
-  callback->Call(context->Global(), 0, nullptr);
+  callback->Call(context->Global(), 0 /* argc */, nullptr);
 }
 
 ExtensionsGuestViewContainer* ExtensionsGuestViewContainer::FromID(
@@ -191,6 +192,18 @@ void ExtensionsGuestViewContainer::RegisterDestructionCallback(
   destruction_isolate_ = isolate;
 }
 
+void ExtensionsGuestViewContainer::RegisterElementResizeCallback(
+    v8::Handle<v8::Function> callback,
+    v8::Isolate* isolate) {
+  element_resize_callback_.reset(callback);
+  element_resize_isolate_ = isolate;
+}
+
+void ExtensionsGuestViewContainer::DidResizeElement(const gfx::Size& old_size,
+                                                    const gfx::Size& new_size) {
+  // TODO(paulmeyer): Call the |element_resize_callback_| callback here.
+}
+
 bool ExtensionsGuestViewContainer::OnMessageReceived(
     const IPC::Message& message) {
   OnHandleCallback(message);