pdf: Create a separate component for using the pdf pepper plugin.

ppapi/c/private/ppb_pdf.h

Index: ppapi/c/private/ppb_pdf.h
diff --git a/ppapi/c/private/ppb_pdf.h b/ppapi/c/private/ppb_pdf.h
index c0b570bc6bb5be7392d24308b75b1710d7127d52..fdd62fe3ffe7fb4b5aab548391a9dff3c79632b7 100644
--- a/ppapi/c/private/ppb_pdf.h
+++ b/ppapi/c/private/ppb_pdf.h
@@ -158,11 +158,11 @@ struct PPB_PDF {
                                           float scale);
 
   // Invoke password dialog for plugin.
- struct PP_Var (*ModalPromptForPassword)(PP_Instance instance,
-                                         struct PP_Var message);
+  struct PP_Var (*ModalPromptForPassword)(PP_Instance instance,
+                                          struct PP_Var message);
 
- // Returns PP_TRUE if the plugin is out of process.
- PP_Bool(*IsOutOfProcess)(PP_Instance instance);
+  // Returns PP_TRUE if the plugin is out of process.
+  PP_Bool (*IsOutOfProcess)(PP_Instance instance);
 
   // Sets the selected text of the plugin.
   void(*SetSelectedText)(PP_Instance instance, const char* selected_text);