Add support for loading extensions (issue #1947)

- Add CefRequestContext::LoadExtension, CefExtension, CefExtensionHandler and
  related methods/interfaces.
- Add chrome://extensions-support that lists supported Chrome APIs.
- Add CefBrowserHost::SetAutoResizeEnabled and CefDisplayHandler::OnAutoResize
  to support browser resize based on preferred web contents size.
- views: Add support for custom CefMenuButton popups.
- cefclient: Run with `--load-extension=set_page_color` command-line flag for
  an extension loading example. Add `--use-views` on Windows and Linux for an
  even better example.

tools/cef_parser.py

@@ -99,7 +99,8 @@ def get_comment(body, name):
     if len(line) == 0:
       # check if the next previous line is a comment
       prevdata = get_prev_line(body, pos)
-      if string.strip(prevdata['line'])[0:2] == '//':
+      prevline = string.strip(prevdata['line'])
+      if prevline[0:2] == '//' and prevline[0:3] != '///':
         result.append(None)
       else:
         break
@@ -538,26 +539,6 @@ class obj_header:
     p = re.compile('\nclass' + _cre_space + _cre_cfname + ';')
     forward_declares = p.findall(data)
 
-    # extract classes
-    p = re.compile('\n' + _cre_attrib + '\nclass' + _cre_space + _cre_cfname +
-                   _cre_space + ':' + _cre_space + 'public' + _cre_virtual +
-                   _cre_space + _cre_cfname + _cre_space + '{(.*?)\n};',
-                   re.MULTILINE | re.DOTALL)
-    list = p.findall(data)
-    if len(list) > 0:
-      added = True
-
-      # build the class objects
-      for attrib, name, parent_name, body in list:
-        # Style may place the ':' on the next line.
-        comment = get_comment(data, name + ' :')
-        if len(comment) == 0:
-          comment = get_comment(data, name + "\n")
-        validate_comment(filename, name, comment)
-        self.classes.append(
-            obj_class(self, filename, attrib, name, parent_name, body, comment,
-                      includes, forward_declares))
-
     # extract empty classes
     p = re.compile('\n' + _cre_attrib + '\nclass' + _cre_space + _cre_cfname +
                    _cre_space + ':' + _cre_space + 'public' + _cre_virtual +
@@ -578,6 +559,30 @@ class obj_header:
             obj_class(self, filename, attrib, name, parent_name, "", comment,
                       includes, forward_declares))
 
+      # Remove empty classes from |data| so we don't mess up the non-empty
+      # class search that follows.
+      data = p.sub('', data)
+
+    # extract classes
+    p = re.compile('\n' + _cre_attrib + '\nclass' + _cre_space + _cre_cfname +
+                   _cre_space + ':' + _cre_space + 'public' + _cre_virtual +
+                   _cre_space + _cre_cfname + _cre_space + '{(.*?)\n};',
+                   re.MULTILINE | re.DOTALL)
+    list = p.findall(data)
+    if len(list) > 0:
+      added = True
+
+      # build the class objects
+      for attrib, name, parent_name, body in list:
+        # Style may place the ':' on the next line.
+        comment = get_comment(data, name + ' :')
+        if len(comment) == 0:
+          comment = get_comment(data, name + "\n")
+        validate_comment(filename, name, comment)
+        self.classes.append(
+            obj_class(self, filename, attrib, name, parent_name, body, comment,
+                      includes, forward_declares))
+
     if added:
       # a global function or class was read from the header file
       self.filenames.append(filename)