Getting rid of more webview memory leaks.

components/guest_view/browser/guest_view_base.cc

Index: components/guest_view/browser/guest_view_base.cc
diff --git a/components/guest_view/browser/guest_view_base.cc b/components/guest_view/browser/guest_view_base.cc
index 201e08108e395fef62f7aa205fbb4cb6907a7c12..0f272a370056268400b9db57b0878386addc6e51 100644
--- a/components/guest_view/browser/guest_view_base.cc
+++ b/components/guest_view/browser/guest_view_base.cc
@@ -110,15 +110,17 @@ class GuestViewBase::OwnerContentsObserver : public WebContentsObserver {
       return;
 
     destroyed_ = true;
-    guest_->EmbedderWillBeDestroyed();
+    GuestViewManager::FromBrowserContext(web_contents()->GetBrowserContext())
+        ->EmbedderWillBeDestroyed(
+            web_contents()->GetRenderProcessHost()->GetID());
     guest_->Destroy();
   }
 
   DISALLOW_COPY_AND_ASSIGN(OwnerContentsObserver);
 };
 
-// This observer ensures that the GuestViewBase destroys itself when its
-// embedder goes away.
+// This observer ensures that the GuestViewBase destroys itself if its opener
+// WebContents goes away before the GuestViewBase is attached.
 class GuestViewBase::OpenerLifetimeObserver : public WebContentsObserver {
  public:
   OpenerLifetimeObserver(GuestViewBase* guest)
@@ -318,6 +320,11 @@ void GuestViewBase::SetSize(const SetSizeParams& params) {
 }
 
 // static
+void GuestViewBase::CleanUp(int embedder_process_id, int view_instance_id) {
+  // TODO(paulmeyer): Add in any general GuestView cleanup work here.
+}
+
+// static
 GuestViewBase* GuestViewBase::FromWebContents(const WebContents* web_contents) {
   WebContentsGuestViewMap* guest_map = webcontents_guestview_map.Pointer();
   auto it = guest_map->find(web_contents);