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 ca5960debd08b370f9822dd47d5473f775309148..c23e60420b0b9c059988cf1b421759c1096e93c5 100644
--- a/extensions/renderer/guest_view/extensions_guest_view_container.cc
+++ b/extensions/renderer/guest_view/extensions_guest_view_container.cc
@@ -141,7 +141,8 @@ ExtensionsGuestViewContainer::ExtensionsGuestViewContainer(
     content::RenderFrame* render_frame)
     : GuestViewContainer(render_frame),
       ready_(false),
-      destruction_isolate_(nullptr) {
+      destruction_isolate_(nullptr),
+      element_resize_isolate_(nullptr) {
 }
 
 ExtensionsGuestViewContainer::~ExtensionsGuestViewContainer() {
@@ -162,7 +163,7 @@ 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(
@@ -186,6 +187,40 @@ 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::OnElementResize(const gfx::Size& old_size,
+                                                   const gfx::Size& new_size) {
+  // Call the element resize callback, if one is registered.
+  if (element_resize_callback_.IsEmpty())
+    return;
+
+  v8::HandleScope handle_scope(element_resize_isolate_);
+  v8::Handle<v8::Function> callback =
+      element_resize_callback_.NewHandle(element_resize_isolate_);
+  v8::Handle<v8::Context> context = callback->CreationContext();
+  if (context.IsEmpty())
+    return;
+
+  const int argc = 4;
+  v8::Handle<v8::Value> argv[argc] = {
+    v8::Integer::New(element_resize_isolate_, old_size.width()),
+    v8::Integer::New(element_resize_isolate_, old_size.height()),
+    v8::Integer::New(element_resize_isolate_, new_size.width()),
+    v8::Integer::New(element_resize_isolate_, new_size.height())
+  };
+
+  v8::Context::Scope context_scope(context);
+  blink::WebScopedMicrotaskSuppression suppression;
+
+  callback->Call(context->Global(), argc, argv);
+}
+
 bool ExtensionsGuestViewContainer::OnMessageReceived(
     const IPC::Message& message) {
   OnHandleCallback(message);