Move textual replacement to WebContents.

content/public/browser/web_contents.h

Index: content/public/browser/web_contents.h
diff --git a/content/public/browser/web_contents.h b/content/public/browser/web_contents.h
index 4cbbcec679ac4453ec930b28183b212f5fb6aa31..d84774fdcc36387d2c332fd439e548dec969559f 100644
--- a/content/public/browser/web_contents.h
+++ b/content/public/browser/web_contents.h
@@ -328,10 +328,17 @@ class WebContents : public PageNavigator,
   // heap-allocated pointer is owned by the caller.
   virtual WebContents* Clone() = 0;
 
-  // Actions on the focused frame ----------------------------------------------
-
+  // Reloads the focused frame.
   virtual void ReloadFocusedFrame(bool ignore_cache) = 0;
 
+  // Editing commands ----------------------------------------------------------
+
+  // Replaces the currently selected word or a word around the cursor.
+  virtual void Replace(const base::string16& word) = 0;
+
+  // Replaces the misspelling in the current selection.
+  virtual void ReplaceMisspelling(const base::string16& word) = 0;
+
   // Views and focus -----------------------------------------------------------
 
   // Focuses the first (last if |reverse| is true) element in the page.