Pepper: Reduce includes in generated thunks.

ppapi/thunk/ppb_printing_dev_thunk.cc

Index: ppapi/thunk/ppb_printing_dev_thunk.cc
diff --git a/ppapi/thunk/ppb_printing_dev_thunk.cc b/ppapi/thunk/ppb_printing_dev_thunk.cc
index 117ef17ca753ae65a1573c49ecfae43e5cb30fa6..96f52f5832cd9c7608725593a1bbc36ccbac74d0 100644
--- a/ppapi/thunk/ppb_printing_dev_thunk.cc
+++ b/ppapi/thunk/ppb_printing_dev_thunk.cc
@@ -2,17 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// From dev/ppb_printing_dev.idl modified Fri Apr 19 10:45:09 2013.
+// From dev/ppb_printing_dev.idl modified Tue Aug 20 08:13:36 2013.
 
 #include "ppapi/c/dev/ppb_printing_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/shared_impl/tracked_callback.h"
 #include "ppapi/thunk/enter.h"
-#include "ppapi/thunk/ppb_instance_api.h"
+#include "ppapi/thunk/ppapi_thunk_export.h"
 #include "ppapi/thunk/ppb_printing_api.h"
-#include "ppapi/thunk/resource_creation_api.h"
-#include "ppapi/thunk/thunk.h"
 
 namespace ppapi {
 namespace thunk {
@@ -46,7 +44,8 @@ const PPB_Printing_Dev_0_7 g_ppb_printing_dev_thunk_0_7 = {
 
 }  // namespace
 
-const PPB_Printing_Dev_0_7* GetPPB_Printing_Dev_0_7_Thunk() {
+PPAPI_THUNK_EXPORT const PPB_Printing_Dev_0_7*
+    GetPPB_Printing_Dev_0_7_Thunk() {
   return &g_ppb_printing_dev_thunk_0_7;
 }