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

components/omnibox/browser/omnibox_view.h

Index: components/omnibox/browser/omnibox_view.h
diff --git a/components/omnibox/browser/omnibox_view.h b/components/omnibox/browser/omnibox_view.h
index bb6326867433261a164c6b19a5d0760088d8df46..8c18d5fb65e5aadd6d9c9ecd56c71bfec397cc51 100644
--- a/components/omnibox/browser/omnibox_view.h
+++ b/components/omnibox/browser/omnibox_view.h
@@ -98,14 +98,12 @@ class OmniboxView {
                                         bool update_popup,
                                         bool notify_text_changed) = 0;
 
-  // Sets the edit to forced query mode.  Practically speaking, this means that
-  // if the edit is not in forced query mode, its text is set to "?" with the
-  // cursor at the end, and if the edit is in forced query mode (its first
-  // non-whitespace character is '?'), the text after the '?' is selected.
-  //
-  // In the future we should display the search engine UI for the default engine
-  // rather than '?'.
-  virtual void SetForcedQuery() = 0;
+  // Sets the caret position.
+  virtual void SetCaretPos(size_t caret_pos) = 0;
+
+  // Transitions the user into keyword mode with their default search provider,
+  // preserving and selecting the user's text if they already typed in a query.
+  virtual void EnterKeywordModeForDefaultSearchProvider() = 0;
 
   // Returns true if all text is selected or there is no text at all.
   virtual bool IsSelectAll() const = 0;