Add "previewing on hover" support for password field.

components/autofill/content/browser/content_autofill_driver.cc

Index: components/autofill/content/browser/content_autofill_driver.cc
diff --git a/components/autofill/content/browser/content_autofill_driver.cc b/components/autofill/content/browser/content_autofill_driver.cc
index 93e44550154d6cc659377e42b9ed2e2a96007155..9983276e4629ef6023d99f6148b92af8150c7fc2 100644
--- a/components/autofill/content/browser/content_autofill_driver.cc
+++ b/components/autofill/content/browser/content_autofill_driver.cc
@@ -133,7 +133,7 @@ void ContentAutofillDriver::RendererShouldAcceptDataListSuggestion(
       new AutofillMsg_AcceptDataListSuggestion(host->GetRoutingID(), value));
 }
 
-void ContentAutofillDriver::RendererShouldAcceptPasswordAutofillSuggestion(
+void ContentAutofillDriver::RendererShouldFillPassword(
     const base::string16& username) {
   if (!RendererIsAvailable())
     return;
@@ -142,6 +142,15 @@ void ContentAutofillDriver::RendererShouldAcceptPasswordAutofillSuggestion(
       host->GetRoutingID(), username));
 }
 
+void ContentAutofillDriver::RendererShouldPreviewPassword(
+    const base::string16& username) {
+  if (!RendererIsAvailable())
+    return;
+  content::RenderViewHost* host = web_contents()->GetRenderViewHost();
+  host->Send(
+      new AutofillMsg_PreviewPassword(host->GetRoutingID(), username));
+}
+
 void ContentAutofillDriver::RendererShouldClearFilledForm() {
   if (!RendererIsAvailable())
     return;