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/cpptools/cppsemanticinfoupdater.cpp

@@ -53,11 +53,11 @@ namespace CppTools {
 class SemanticInfoUpdaterPrivate
 {
 public:
-    class FuturizedTopLevelDeclarationProcessor: public CPlusPlus::TopLevelDeclarationProcessor
+    class FuturizedTopLevelDeclarationProcessor: public TopLevelDeclarationProcessor
     {
     public:
         FuturizedTopLevelDeclarationProcessor(QFutureInterface<void> &future): m_future(future) {}
-        bool processDeclaration(CPlusPlus::DeclarationAST *) { return !isCanceled(); }
+        bool processDeclaration(DeclarationAST *) { return !isCanceled(); }
         bool isCanceled() { return m_future.isCanceled(); }
     private:
         QFutureInterface<void> m_future;