Add media size capability to PDF printer.

chrome/browser/ui/webui/print_preview/print_preview_handler.h

Index: chrome/browser/ui/webui/print_preview/print_preview_handler.h
diff --git a/chrome/browser/ui/webui/print_preview/print_preview_handler.h b/chrome/browser/ui/webui/print_preview/print_preview_handler.h
index 5ff8fb4dd55d968638b1848652e42b62fa151d73..51befdec5b5496631a8f2f7d37396a3daa93ad1d 100644
--- a/chrome/browser/ui/webui/print_preview/print_preview_handler.h
+++ b/chrome/browser/ui/webui/print_preview/print_preview_handler.h
@@ -175,6 +175,9 @@ class PrintPreviewHandler
   // preview is displayed.
   void HandleGetInitialSettings(const base::ListValue* args);
 
+  // Asks the browser for the PDF printer capabilities, such as media size.
+  void HandleGetPdfCapabilities(const base::ListValue* args);
+
   // Reports histogram data for a print preview UI action. |args| should consist
   // of two elements: the bucket name, and the bucket event.
   void HandleReportUiEvent(const base::ListValue* args);
@@ -192,6 +195,9 @@ class PrintPreviewHandler
 
   void SendInitialSettings(const std::string& default_printer);
 
+  // Sends PDF printer capabilities to the Web UI.
+  void SendPdfCapabilities(const base::DictionaryValue* capabilities);
+
   // Send OAuth2 access token.
   void SendAccessToken(const std::string& type,
                        const std::string& access_token);