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/clangcodemodel/clangcompleter.cpp

@@ -46,12 +46,16 @@
 
 //#define TIME_COMPLETION
 
-class ClangCodeModel::ClangCompleter::PrivateData
+using namespace ClangCodeModel::Internal;
+
+namespace ClangCodeModel {
+
+class ClangCompleter::PrivateData
 {
 public:
     PrivateData()
         : m_mutex(QMutex::Recursive)
-        , m_unit(Internal::Unit::create())
+        , m_unit(Unit::create())
         , m_isSignalSlotCompletion(false)
     {
     }
@@ -60,7 +64,7 @@ public:
     {
     }
 
-    bool parseFromFile(const Internal::UnsavedFiles &unsavedFiles)
+    bool parseFromFile(const UnsavedFiles &unsavedFiles)
     {
         Q_ASSERT(!m_unit->isLoaded());
         if (m_unit->fileName().isEmpty())
@@ -80,13 +84,10 @@ public:
 
 public:
     QMutex m_mutex;
-    Internal::Unit::Ptr m_unit;
+    Unit::Ptr m_unit;
     bool m_isSignalSlotCompletion;
 };
 
-using namespace ClangCodeModel;
-using namespace ClangCodeModel::Internal;
-
 /**
  * @brief Constructs with highest possible priority
  */
@@ -127,7 +128,7 @@ QString ClangCompleter::fileName() const
 void ClangCompleter::setFileName(const QString &fileName)
 {
     if (d->m_unit->fileName() != fileName) {
-        d->m_unit = Internal::Unit::create(fileName);
+        d->m_unit = Unit::create(fileName);
     }
 }
 
@@ -208,3 +209,5 @@ QMutex *ClangCompleter::mutex() const
 {
     return &d->m_mutex;
 }
+
+} // namespace ClangCodeModel