Move core/include/fpdfapi/fpdf_pageobj.h into core/fpdfapi.

core/fpdfapi/fpdf_page/cpdf_graphicstates.cpp

+// Copyright 2016 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/fpdfapi/fpdf_page/cpdf_graphicstates.h"
+
+void CPDF_GraphicStates::DefaultStates() {
+  m_ColorState.New()->Default();
+}
+
+void CPDF_GraphicStates::CopyStates(const CPDF_GraphicStates& src) {
+  m_ClipPath = src.m_ClipPath;
+  m_GraphState = src.m_GraphState;
+  m_ColorState = src.m_ColorState;
+  m_TextState = src.m_TextState;
+  m_GeneralState = src.m_GeneralState;
+}