Export a function from the PDF plugin to get the dimensions of a PDF page.

pdf/pdfium/pdfium_engine.cc

 // Copyright (c) 2012 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.
 
 #include "pdf/pdfium/pdfium_engine.h"
 
 #include <math.h>
 
 #include "base/json/json_writer.h"
 #include "base/logging.h"
@@ skipping 3388 matching lines @@
       FPDF_GetPageSizeByIndex(doc, page_number, &page_width, &page_height);
       if (page_width > *max_page_width) {
         *max_page_width = page_width;
       }
     }
   }
   FPDF_CloseDocument(doc);
   return true;
 }
 
+bool PDFiumEngineExports::GetPDFPageSizeByIndex(
+    const void* pdf_buffer,
+    int pdf_buffer_size,
+    int page_number,
+    double* width,
+    double* height) {
+  FPDF_DOCUMENT doc = FPDF_LoadMemDocument(pdf_buffer, pdf_buffer_size, NULL);
+  if (!doc)
+    return false;
+  bool success = FPDF_GetPageSizeByIndex(doc, page_number, width, height) != 0;
+  FPDF_CloseDocument(doc);
+  return success;
+}
+
 }  // namespace chrome_pdf