C++: Remove unneeded qualifications

Mostly done using the following ruby script:
Dir.glob('**/*.cpp').each { |file|
  next if file =~ %r{src/shared/qbs|/qmljs/}
  s = File.read(file)
  s.scan(/^using namespace (.*);$/) {
    ns = $1
    t = s.gsub(/^(.*)\b#{ns}::((?!Const)[A-Z])/) { |m|
      before = $1
      char = $2
      if before =~ /"|\/\/|\\|using|SIGNAL|SLOT|Q_/
        m
      else
        before + char
      end
    }
    if t != s
      puts file
      File.open(file, 'w').write(t)
    end
  }
}

Change-Id: I6fbe13ddc1485efe95c3156097bf41d90c0febac
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/cppeditor/cppfollowsymbolundercursor.cpp

@@ -308,7 +308,7 @@ inline LookupItem skipForwardDeclarations(const QList<LookupItem> &resolvedSymbo
 }
 
 CppEditorWidget::Link attemptFuncDeclDef(const QTextCursor &cursor,
-    CppEditorWidget *, CPlusPlus::Snapshot snapshot, const CPlusPlus::Document::Ptr &document,
+    CppEditorWidget *, Snapshot snapshot, const Document::Ptr &document,
     SymbolFinder *symbolFinder)
 {
     Link result;
@@ -624,7 +624,7 @@ TextEditorWidget::Link FollowSymbolUnderCursor::findLink(const QTextCursor &curs
             continue;
         if (ch == QLatin1Char('(') && !expression.isEmpty()) {
             tc.setPosition(pos);
-            if (TextEditor::TextBlockUserData::findNextClosingParenthesis(&tc, true))
+            if (TextBlockUserData::findNextClosingParenthesis(&tc, true))
                 expression.append(tc.selectedText());
         }
 
@@ -684,8 +684,7 @@ TextEditorWidget::Link FollowSymbolUnderCursor::findLink(const QTextCursor &curs
                     params.openInNextSplit = inNextSplit;
 
                     if (m_virtualFunctionAssistProvider->configure(params)) {
-                        m_widget->invokeAssist(TextEditor::FollowSymbol,
-                                               m_virtualFunctionAssistProvider);
+                        m_widget->invokeAssist(FollowSymbol, m_virtualFunctionAssistProvider);
                         m_virtualFunctionAssistProvider->clearParams();
                     }