Fix autocomplete for Gmail subject lines.

chrome/renderer/autofill_helper.cc

Index: chrome/renderer/autofill_helper.cc
diff --git a/chrome/renderer/autofill_helper.cc b/chrome/renderer/autofill_helper.cc
index b3835045bafb7cfd951d852fd20bd9711fa6fb57..8299c6f774035d4db2ade9619e5c70f2efe268da 100644
--- a/chrome/renderer/autofill_helper.cc
+++ b/chrome/renderer/autofill_helper.cc
@@ -270,8 +270,20 @@ void AutoFillHelper::QueryAutoFillSuggestions(
 
   webkit_glue::FormData form;
   webkit_glue::FormField field;
-  if (!FindFormAndFieldForNode(node, &form, &field))
-    return;
+  if (!FindFormAndFieldForNode(node, &form, &field)) {
+    // If we didn't find the cached form, at least let autocomplete have a shot
+    // at providing suggestions.
+    FormManager::WebFormControlElementToFormField(
+        node.toConst<WebFormControlElement>(), FormManager::EXTRACT_VALUE,
+        &field);
+
+    // Really, though, this case should not be reachable. Log the source website
+    // to help debug why we do sometimes reach this case.
+    GURL url = node.document().frame()->url();

[dhollowa, 2011/01/14 16:13:28]

As tempting as this logging may be, there are privacy implications.  We need to
take this out.

+    LOG(WARNING) << "Failed to find cached form at "
+                 << url.GetOrigin().spec()
+                 << ".  Please add this URL to http://crbug.com/69611.";
+  }
 
   render_view_->Send(new ViewHostMsg_QueryFormFieldAutoFill(
       render_view_->routing_id(), autofill_query_id_, form, field));