Add spell checking support (issue #137).

This includes:
- Red underline of misspelled words in html text areas.
- Right-click context menu options to correct the misspelled word.
- New CefBrowser::ReplaceMisspelling method for accepting a word replacement.
- Methods added to CefContextMenuParams for retrieving spelling-related information.
- Uses the unified text checker when auto-correct is not enabled to match Google Chrome behavior.
- On Windows and Linux a hunspell dictionary file will be downloaded to the "<cache_path>/Dictionaries" directory as needed, or used from the <cache_path> directory if the file already exists there. The dictionary file will be downloaded from http://cache.pack.google.com/edgedl/chrome/dict/<LANG>-3-0.bdic where <LANG> is the language abbreviation.
- On OS X the spell checking implementation will use the system NSSpellChecker implementation.

The following command-line flags have been added:
--disable-spell-checking => Disable spell-checking support (no red underline, no dictionary file download, etc).
--enable-spelling-auto-correct => Automatically correct common misspellings while typing (like 'omre' to 'more' on Windows/Linux or 'ehlo' to 'helo' on OS X).
--enable-spelling-service => Enable use of the remote Google spelling service (this requires Google API keys).
--override-spell-check-lang=<LANG> => Use the specified dictionary language <LANG> instead of the language specified in the locales.pak file. To see the default/supported dictionary languages: https://code.google.com/p/chromium/codesearch#search/&q=IDS_SPELLCHECK_DICTIONARY%20xtb&sq=package:chromium


git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1859 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef_dll/ctocpp/context_menu_params_ctocpp.cc

@@ -11,6 +11,7 @@
 //
 
 #include "libcef_dll/ctocpp/context_menu_params_ctocpp.h"
+#include "libcef_dll/transfer_util.h"
 
 
 // VIRTUAL METHODS - Body may be edited by hand.
@@ -200,6 +201,62 @@ CefString CefContextMenuParamsCToCpp::GetSelectionText() {
   return _retvalStr;
 }
 
+CefString CefContextMenuParamsCToCpp::GetMisspelledWord() {
+  if (CEF_MEMBER_MISSING(struct_, get_misspelled_word))
+    return CefString();
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  cef_string_userfree_t _retval = struct_->get_misspelled_word(struct_);
+
+  // Return type: string
+  CefString _retvalStr;
+  _retvalStr.AttachToUserFree(_retval);
+  return _retvalStr;
+}
+
+int CefContextMenuParamsCToCpp::GetMisspellingHash() {
+  if (CEF_MEMBER_MISSING(struct_, get_misspelling_hash))
+    return 0;
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  int _retval = struct_->get_misspelling_hash(struct_);
+
+  // Return type: simple
+  return _retval;
+}
+
+bool CefContextMenuParamsCToCpp::GetDictionarySuggestions(
+    std::vector<CefString>& suggestions) {
+  if (CEF_MEMBER_MISSING(struct_, get_dictionary_suggestions))
+    return false;
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Translate param: suggestions; type: string_vec_byref
+  cef_string_list_t suggestionsList = cef_string_list_alloc();
+  DCHECK(suggestionsList);
+  if (suggestionsList)
+    transfer_string_list_contents(suggestions, suggestionsList);
+
+  // Execute
+  int _retval = struct_->get_dictionary_suggestions(struct_,
+      suggestionsList);
+
+  // Restore param:suggestions; type: string_vec_byref
+  if (suggestionsList) {
+    suggestions.clear();
+    transfer_string_list_contents(suggestionsList, suggestions);
+    cef_string_list_free(suggestionsList);
+  }
+
+  // Return type: bool
+  return _retval?true:false;
+}
+
 bool CefContextMenuParamsCToCpp::IsEditable() {
   if (CEF_MEMBER_MISSING(struct_, is_editable))
     return false;
@@ -213,6 +270,19 @@ bool CefContextMenuParamsCToCpp::IsEditable() {
   return _retval?true:false;
 }
 
+bool CefContextMenuParamsCToCpp::IsSpellCheckEnabled() {
+  if (CEF_MEMBER_MISSING(struct_, is_spell_check_enabled))
+    return false;
+
+  // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
+
+  // Execute
+  int _retval = struct_->is_spell_check_enabled(struct_);
+
+  // Return type: bool
+  return _retval?true:false;
+}
+
 CefContextMenuParams::EditStateFlags CefContextMenuParamsCToCpp::GetEditStateFlags(
     ) {
   if (CEF_MEMBER_MISSING(struct_, get_edit_state_flags))