Interpret '?' and Ctrl-K or Ctrl-E as putting omnibox in keyword search mode for Default Search Pro…

components/omnibox/browser/search_provider.cc

Index: components/omnibox/browser/search_provider.cc
diff --git a/components/omnibox/browser/search_provider.cc b/components/omnibox/browser/search_provider.cc
index ab129045d463d475bec2afa4412c14ecfade3212..ee0f405e37740db135f934855fd170e56d26a7cb 100644
--- a/components/omnibox/browser/search_provider.cc
+++ b/components/omnibox/browser/search_provider.cc
@@ -745,11 +745,6 @@ bool SearchProvider::IsQueryPotentionallyPrivate() const {
   // If the input type might be a URL, we take extra care so that private data
   // isn't sent to the server.
 
-  // FORCED_QUERY means the user is explicitly asking us to search for this, so
-  // we assume it isn't a URL and/or there isn't private data.
-  if (input_.type() == metrics::OmniboxInputType::FORCED_QUERY)
-    return false;
-
   // Next we check the scheme.  If this is UNKNOWN/URL with a scheme that isn't
   // http/https/ftp, we shouldn't send it.  Sending things like file: and data:
   // is both a waste of time and a disclosure of potentially private, local
@@ -1316,7 +1311,6 @@ int SearchProvider::
   switch (input_.type()) {
     case metrics::OmniboxInputType::UNKNOWN:
     case metrics::OmniboxInputType::QUERY:
-    case metrics::OmniboxInputType::FORCED_QUERY:
       return kNonURLVerbatimRelevance;
 
     case metrics::OmniboxInputType::URL:
@@ -1427,13 +1421,6 @@ AutocompleteMatch SearchProvider::NavigationToMatch(
                                    net::UnescapeRule::SPACES, nullptr, nullptr,
                                    &inline_autocomplete_offset),
           client()->GetSchemeClassifier());
-  // Preserve the forced query '?' prefix in |match.fill_into_edit|.
-  // Otherwise, user edits to a suggestion would show non-Search results.
-  if (input_.type() == metrics::OmniboxInputType::FORCED_QUERY) {
-    match.fill_into_edit.insert(0, base::ASCIIToUTF16("?"));
-    if (inline_autocomplete_offset != base::string16::npos)
-      ++inline_autocomplete_offset;
-  }
   if (inline_autocomplete_offset != base::string16::npos) {
     DCHECK(inline_autocomplete_offset <= match.fill_into_edit.length());
     match.inline_autocompletion =