pdf: Move PepperPDFHost into the pdf component.

chrome/renderer/pepper/chrome_pdf_print_client.cc

Index: chrome/renderer/pepper/chrome_pdf_print_client.cc
diff --git a/chrome/renderer/pepper/chrome_pdf_print_client.cc b/chrome/renderer/pepper/chrome_pdf_print_client.cc
index 32d1e097059dab0eebf2e5051517d02af1922a25..51ab320a00abff397f779c4c1fa618f123a30e03 100644
--- a/chrome/renderer/pepper/chrome_pdf_print_client.cc
+++ b/chrome/renderer/pepper/chrome_pdf_print_client.cc
@@ -44,9 +44,12 @@ bool ChromePDFPrintClient::IsPrintingEnabled(PP_Instance instance_id) {
   return helper && helper->IsPrintingEnabled();
 }
 
-void ChromePDFPrintClient::Print(PP_Instance instance_id) {
+bool ChromePDFPrintClient::Print(PP_Instance instance_id) {
   blink::WebElement element = GetWebElement(instance_id);
   printing::PrintWebViewHelper* helper = GetPrintWebViewHelper(element);
-  if (helper)
+  if (helper) {
     helper->PrintNode(element);
+    return true;
+  }
+  return false;
 }