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

pdf/pdf.cc

Index: pdf/pdf.cc
diff --git a/pdf/pdf.cc b/pdf/pdf.cc
index a4997a582dc35c4ad6dd763ab17dc39e86f05dc5..95987c4ade026ff514e636404fe4f429021a0739 100644
--- a/pdf/pdf.cc
+++ b/pdf/pdf.cc
@@ -199,6 +199,27 @@ bool GetPDFDocInfo(const void* pdf_buffer,
   return ret;
 }
 
+PDF_USED PP_EXPORT
+bool GetPDFPageSizeByIndex(const void* pdf_buffer,
+                           int buffer_size, int index,
+                           double* width, double* height) {
+  if (!g_sdk_initialized_via_pepper) {
+    void* data = NULL;
+#if defined(OS_WIN)
+    data = g_hmodule;
+#endif
+    if (!chrome_pdf::InitializeSDK(data))
+      return false;
+  }
+  scoped_ptr<chrome_pdf::PDFEngineExports> engine_exports(
+      chrome_pdf::PDFEngineExports::Create());
+  bool ret = engine_exports->GetPDFPageSizeByIndex(
+      pdf_buffer, buffer_size, index, width, height);
+  if (!g_sdk_initialized_via_pepper)
+    chrome_pdf::ShutdownSDK();
+  return ret;
+}
+
 // Renders PDF page into 4-byte per pixel BGRA color bitmap.
 // |pdf_buffer| is the buffer that contains the entire PDF document to be
 //     rendered.