pdf: Move PepperPDFHost into the pdf component.

chrome/renderer/pepper/chrome_pdf_print_delegate.cc

Index: chrome/renderer/pepper/chrome_pdf_print_delegate.cc
diff --git a/chrome/renderer/pepper/chrome_pdf_print_delegate.cc b/chrome/renderer/pepper/chrome_pdf_print_delegate.cc
index 59e692bd0bbe1bc86ad6e7c78384652ce11f70d1..04dd69878ca2adaba9a5718ed1c1439387413231 100644
--- a/chrome/renderer/pepper/chrome_pdf_print_delegate.cc
+++ b/chrome/renderer/pepper/chrome_pdf_print_delegate.cc
@@ -42,9 +42,12 @@ bool ChromePDFPrintDelegate::IsPrintingEnabled(PP_Instance instance_id) {
   return helper && helper->IsPrintingEnabled();
 }
 
-void ChromePDFPrintDelegate::Print(PP_Instance instance_id) {
+bool ChromePDFPrintDelegate::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;
 }