Add IPC to notify BrowserPlugin when RenderProcess is ready.

content/browser/browser_plugin/browser_plugin_guest.cc

Index: content/browser/browser_plugin/browser_plugin_guest.cc
diff --git a/content/browser/browser_plugin/browser_plugin_guest.cc b/content/browser/browser_plugin/browser_plugin_guest.cc
index c518aca9d1e12121f0402d281f1b6ed274008429..f875200a8e52cbf0ebf77ba0c9e2ade65e95ffad 100644
--- a/content/browser/browser_plugin/browser_plugin_guest.cc
+++ b/content/browser/browser_plugin/browser_plugin_guest.cc
@@ -639,6 +639,14 @@ void BrowserPluginGuest::RenderViewReady() {
   Send(new InputMsg_SetFocus(routing_id(), focused_));
   UpdateVisibility();
 
+  // In case we've created a new guest render process after a crash, let the
+  // associated BrowserPlugin know. We only need to send this if we're attached,
+  // as the guest_crashed_ is cleared automaticall on attach anyways.

[kenrb, 2016/10/07 15:41:13]

nit: typo 'automaticall'

+  if (attached()) {
+    SendMessageToEmbedder(
+        new BrowserPluginMsg_GuestReady(browser_plugin_instance_id()));
+  }
+
   RenderWidgetHostImpl::From(rvh->GetWidget())
       ->set_hung_renderer_delay(
           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs));