Add PPAPI C++ wrappers for PDF.

ppapi/cpp/private/pdf.h

Index: ppapi/cpp/private/pdf.h
diff --git a/ppapi/cpp/private/pdf.h b/ppapi/cpp/private/pdf.h
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+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_CPP_PRIVATE_PDF_H_
+#define PPAPI_CPP_PRIVATE_PDF_H_
+
+#include <string>
+
+#include "ppapi/c/private/ppb_pdf.h"
+
+namespace pp {
+
+class ImageData;
+class InstanceHandle;
+class Var;
+
+class PDF {
+ public:
+  // Returns true if the required interface is available.
+  static bool IsAvailable();
+
+  static Var GetLocalizedString(const InstanceHandle& instance,
+                                PP_ResourceString string_id);
+  static ImageData GetResourceImage(const InstanceHandle& instance,
+                                    PP_ResourceImage image_id);
+  static PP_Resource GetFontFileWithFallback(
+      const InstanceHandle& instance,
+      const PP_FontDescription_Dev* description,
+      PP_PrivateFontCharset charset);
+  static bool GetFontTableForPrivateFontFile(const InstanceHandle& instance,
+                                             PP_Resource font_file,
+                                             uint32_t table,
+                                             void* output,
+                                             uint32_t* output_length);
+  static void SearchString(const InstanceHandle& instance,
+                           const unsigned short* string,
+                           const unsigned short* term,
+                           bool case_sensitive,
+                           PP_PrivateFindResult** results,
+                           int* count);
+  static void DidStartLoading(const InstanceHandle& instance);
+  static void DidStopLoading(const InstanceHandle& instance);
+  static void SetContentRestriction(const InstanceHandle& instance,
+                                    int restrictions);
+  static void HistogramPDFPageCount(const InstanceHandle& instance,
+                                    int count);
+  static void UserMetricsRecordAction(const InstanceHandle& instance,
+                                      const Var& action);
+  static void HasUnsupportedFeature(const InstanceHandle& instance);
+  static void SaveAs(const InstanceHandle& instance);
+  static void Print(const InstanceHandle& instance);
+  static bool IsFeatureEnabled(const InstanceHandle& instance,
+                               PP_PDFFeature feature);
+  static ImageData GetResourceImageForScale(const InstanceHandle& instance,
+                                            PP_ResourceImage image_id,
+                                            float scale);
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_PRIVATE_PDF_H_