Change CFWL_Widget::GetMatrix to return the matrix

xfa/fwl/cfwl_widgetmgr.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "xfa/fwl/cfwl_widgetmgr.h"
 
 #include <utility>
 
@@ skipping 280 matching lines @@
     return nullptr;
 
   FX_FLOAT x1;
   FX_FLOAT y1;
   CFWL_Widget* child = GetLastChildWidget(parent);
   while (child) {
     if ((child->GetStates() & FWL_WGTSTATE_Invisible) == 0) {
       x1 = x;
       y1 = y;
       CFX_Matrix matrixOnParent;
-      child->GetMatrix(matrixOnParent, false);

[dsinclair, 2016/12/08 19:02:46]

This would, at most, SetIdentity on the matrix, but that would also have just
happened given we just created it.

       CFX_Matrix m;
       m.SetIdentity();
       m.SetReverse(matrixOnParent);
       m.TransformPoint(x1, y1);
       CFX_RectF bounds = child->GetWidgetRect();
       if (bounds.Contains(x1, y1)) {
         x1 -= bounds.left;
         y1 -= bounds.top;
         return GetWidgetAtPoint(child, x1, y1);
       }
@@ skipping 209 matching lines @@
     if (child->GetStates() & FWL_WGTSTATE_Invisible)
       continue;
 
     CFX_RectF rtWidget = child->GetWidgetRect();
     if (rtWidget.IsEmpty())
       continue;
 
     CFX_Matrix widgetMatrix;
     CFX_RectF clipBounds(rtWidget);
     if (!bFormDisable)
-      child->GetMatrix(widgetMatrix, true);
+      widgetMatrix = child->GetMatrix();
     if (pMatrix)
       widgetMatrix.Concat(*pMatrix);
 
     if (!bFormDisable) {
       widgetMatrix.TransformPoint(clipBounds.left, clipBounds.top);
       clipBounds.Intersect(rtClip);
       if (clipBounds.IsEmpty())
         continue;
 
       pGraphics->SaveGraphState();
@@ skipping 178 matching lines @@
       pWidget(widget),
       iRedrawCounter(0)
 #if (_FX_OS_ == _FX_WIN32_DESKTOP_) || (_FX_OS_ == _FX_WIN64_)
       ,
       bOutsideChanged(false)
 #endif
 {
 }
 
 CFWL_WidgetMgr::Item::~Item() {}