Replace some QString::fromRawData() with QStringViews around the code

Even though QString::fromRawData() may not be as expensive as it used
to be, it's still and out-of-line call _and_ more characters to type,
so replace with QStringView construction where applicable.

Change-Id: I70662da1bd45284f67e117e92b25d242afb8aaf8
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

src/corelib/io/qurl.cpp

@@ -1210,7 +1210,7 @@ static const QChar *parseIpFuture(QString &host, const QChar *begin, const QChar
             (begin[2].unicode() >= '0' && begin[2].unicode() <= '9')) {
         // this is so unlikely that we'll just go down the slow path
         // decode the whole string, skipping the "[vH." and "]" which we already know to be there
-        host += QString::fromRawData(begin, 4);
+        host += QStringView(begin, 4);
 
         // uppercase the version, if necessary
         if (begin[2].unicode() >= 'a')

src/corelib/kernel/qcore_mac.mm

@@ -193,7 +193,7 @@ QDebug operator<<(QDebug dbg, CFStringRef stringRef)
         return dbg << "CFStringRef(0x0)";
 
     if (const UniChar *chars = CFStringGetCharactersPtr(stringRef))
-        dbg << QString::fromRawData(reinterpret_cast<const QChar *>(chars), CFStringGetLength(stringRef));
+        dbg << QStringView(reinterpret_cast<const QChar *>(chars), CFStringGetLength(stringRef));
     else
         dbg << QString::fromCFString(stringRef);
 

src/gui/painting/qpaintengine_raster.cpp

@@ -3156,7 +3156,7 @@ void QRasterPaintEngine::drawTextItem(const QPointF &p, const QTextItem &textIte
 #ifdef QT_DEBUG_DRAW
     Q_D(QRasterPaintEngine);
     fprintf(stderr," - QRasterPaintEngine::drawTextItem(), (%.2f,%.2f), string=%s ct=%d\n",
-           p.x(), p.y(), QString::fromRawData(ti.chars, ti.num_chars).toLatin1().data(),
+           p.x(), p.y(), QStringView(ti.chars, ti.num_chars).toLatin1().data(),
            d->glyphCacheFormat);
 #endif
 

src/gui/text/qtextobject.cpp

@@ -1219,7 +1219,7 @@ QString QTextBlock::text() const
     QTextDocumentPrivate::FragmentIterator end = p->find(pos + length() - 1); // -1 to omit the block separator char
     for (; it != end; ++it) {
         const QTextFragmentData * const frag = it.value();
-        text += QString::fromRawData(buffer.constData() + frag->stringPosition, frag->size_array[0]);
+        text += QStringView(buffer.constData() + frag->stringPosition, frag->size_array[0]);
     }
 
     return text;