Remove default argument from RestoreState() methods.

core/fxge/ge/fx_ge_ps.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 "core/fxge/include/fx_ge.h"
 
 #include "core/fxcodec/include/fx_codec.h"
 #include "core/fxge/ge/fx_text_int.h"
@@ skipping 59 matching lines @@
   if (m_bInited) {
     OUTPUT_PS("\nrestore\n");
   }
   m_bInited = FALSE;
 }
 void CFX_PSRenderer::SaveState() {
   StartRendering();
   OUTPUT_PS("q\n");
   m_ClipBoxStack.Add(m_ClipBox);
 }
-void CFX_PSRenderer::RestoreState(FX_BOOL bKeepSaved) {
+
+void CFX_PSRenderer::RestoreState(bool bKeepSaved) {
   StartRendering();
   if (bKeepSaved) {
     OUTPUT_PS("Q\nq\n");
   } else {
     OUTPUT_PS("Q\n");
   }
-  m_bColorSet = m_bGraphStateSet = FALSE;
-  m_ClipBox = m_ClipBoxStack.GetAt(m_ClipBoxStack.GetSize() - 1);
-  if (!bKeepSaved) {
-    m_ClipBoxStack.RemoveAt(m_ClipBoxStack.GetSize() - 1);
-  }
+  m_bColorSet = FALSE;
+  m_bGraphStateSet = FALSE;
+  int size = m_ClipBoxStack.GetSize();
+  if (!size)
+    return;
+
+  m_ClipBox = m_ClipBoxStack.GetAt(size - 1);
+  if (!bKeepSaved)
+    m_ClipBoxStack.RemoveAt(size - 1);
 }
+
 void CFX_PSRenderer::OutputPath(const CFX_PathData* pPathData,
                                 const CFX_Matrix* pObject2Device) {
   int nPoints = pPathData->GetPointCount();
   CFX_ByteTextBuf buf;
   buf.EstimateSize(nPoints * 10);
   for (int i = 0; i < nPoints; i++) {
     uint8_t flag = pPathData->GetFlag(i);
     FX_FLOAT x = pPathData->GetPointX(i);
     FX_FLOAT y = pPathData->GetPointY(i);
     if (pObject2Device) {
@@ skipping 588 matching lines @@
   uint32_t dest_size;
   CCodec_ModuleMgr* pEncoders = CFX_GEModule::Get()->GetCodecModule();
   if (pEncoders &&
       pEncoders->GetBasicModule()->A85Encode(data, len, dest_buf, dest_size)) {
     m_pOutput->OutputPS((const FX_CHAR*)dest_buf, dest_size);
     FX_Free(dest_buf);
   } else {
     m_pOutput->OutputPS((const FX_CHAR*)data, len);
   }
 }