Revert "Related: deb#766788 alloc on heap instead of stack"

This reverts commit acdf54c4.

Change-Id: I1c49a5baac3a3421d23926f4479e674ef46fbf34

vcl/generic/glyphs/gcach_layout.cxx

@@ -372,7 +372,7 @@ bool HbLayoutEngine::layout(ServerFontLayout& rLayout, ImplLayoutArgs& rArgs)
 
     rLayout.Reserve(nGlyphCapacity);
 
-    std::unique_ptr<vcl::ScriptRun> xScriptRun(new vcl::ScriptRun(reinterpret_cast<const UChar *>(rArgs.mpStr), rArgs.mnLength));
+    vcl::ScriptRun aScriptRun(reinterpret_cast<const UChar *>(rArgs.mpStr), rArgs.mnLength);
 
     Point aCurrPos(0, 0);
     while (true)
@@ -385,21 +385,21 @@ bool HbLayoutEngine::layout(ServerFontLayout& rLayout, ImplLayoutArgs& rArgs)
         // Find script subruns.
         int nCurrentPos = nBidiMinRunPos;
         HbScriptRuns aScriptSubRuns;
-        while (xScriptRun->next())
+        while (aScriptRun.next())
         {
-            if (xScriptRun->getScriptStart() <= nCurrentPos && xScriptRun->getScriptEnd() > nCurrentPos)
+            if (aScriptRun.getScriptStart() <= nCurrentPos && aScriptRun.getScriptEnd() > nCurrentPos)
                 break;
         }
 
         while (nCurrentPos < nBidiEndRunPos)
         {
             int32_t nMinRunPos = nCurrentPos;
-            int32_t nEndRunPos = std::min(xScriptRun->getScriptEnd(), nBidiEndRunPos);
-            HbScriptRun aRun(nMinRunPos, nEndRunPos, xScriptRun->getScriptCode());
+            int32_t nEndRunPos = std::min(aScriptRun.getScriptEnd(), nBidiEndRunPos);
+            HbScriptRun aRun(nMinRunPos, nEndRunPos, aScriptRun.getScriptCode());
             aScriptSubRuns.push_back(aRun);
 
             nCurrentPos = nEndRunPos;
-            xScriptRun->next();
+            aScriptRun.next();
         }
 
         // RTL subruns should be reversed to ensure that final glyph order is
@@ -407,7 +407,7 @@ bool HbLayoutEngine::layout(ServerFontLayout& rLayout, ImplLayoutArgs& rArgs)
         if (bRightToLeft)
             std::reverse(aScriptSubRuns.begin(), aScriptSubRuns.end());
 
-        xScriptRun->reset();
+        aScriptRun.reset();
 
         for (HbScriptRuns::iterator it = aScriptSubRuns.begin(); it != aScriptSubRuns.end(); ++it)
         {