Implement asynchronous interface/plumbing for GetDefaultPrintSettings.

ppapi/thunk/ppb_printing_thunk.cc

Index: ppapi/thunk/ppb_printing_thunk.cc
diff --git a/ppapi/thunk/ppb_printing_thunk.cc b/ppapi/thunk/ppb_printing_thunk.cc
index 66021895a7a8ebdb4efc75f1c39b1f9bb34f4c37..106d84538e1d38725a4f45563c601000cbe04595 100644
--- a/ppapi/thunk/ppb_printing_thunk.cc
+++ b/ppapi/thunk/ppb_printing_thunk.cc
@@ -11,22 +11,54 @@ namespace thunk {
 
 namespace {
 
-PP_Bool GetDefaultPrintSettings(PP_Instance instance,
-                                PP_PrintSettings_Dev* print_settings) {
-  EnterInstance enter(instance);
+int32_t GetDefaultPrintSettings(PP_Instance instance,
+                                PP_PrintSettings_Dev* print_settings,
+                                PP_CompletionCallback callback) {
+  EnterInstance enter(instance, callback);
   if (enter.failed())
-    return PP_FALSE;
-  return enter.functions()->GetDefaultPrintSettings(instance, print_settings);
+    return enter.retval();
+  return enter.functions()->GetDefaultPrintSettings(instance, print_settings,
+                                                    enter.callback());
 }
 
-const PPB_Printing_Dev g_ppb_printing_dev_thunk = {
+PP_Bool GetDefaultPrintSettings_0_6(PP_Instance instance,
+                                    PP_PrintSettings_Dev* print_settings) {
+  // TODO(raymes): This is obsolete now. Just return some default settings.
+  // Remove this when all versions of Flash we care about are no longer using
+  // it.
+  PP_PrintSettings_Dev default_settings = {
+    // |printable_area|: all of the sheet of paper.
+    { { 0, 0 }, { 612, 792 } },
+    // |content_area|: 0.5" margins all around.
+    { { 36, 36 }, { 540, 720 } },
+    // |paper_size|: 8.5" x 11" (US letter).
+    { 612, 792 },
+    300,  // |dpi|.
+    PP_PRINTORIENTATION_NORMAL,  // |orientation|.
+    PP_PRINTSCALINGOPTION_NONE,  // |print_scaling_option|.
+    PP_FALSE,  // |grayscale|.
+    PP_PRINTOUTPUTFORMAT_PDF  // |format|.
+  };
+  *print_settings = default_settings;
+  return PP_TRUE;
+}
+
+const PPB_Printing_Dev g_ppb_printing_dev_thunk_0_7 = {
   &GetDefaultPrintSettings,
 };
 
+const PPB_Printing_Dev_0_6 g_ppb_printing_dev_thunk_0_6 = {
+  &GetDefaultPrintSettings_0_6,
+};
+
 }  // namespace
 
 const PPB_Printing_Dev_0_6* GetPPB_Printing_Dev_0_6_Thunk() {
-  return &g_ppb_printing_dev_thunk;
+  return &g_ppb_printing_dev_thunk_0_6;
+}
+
+const PPB_Printing_Dev_0_7* GetPPB_Printing_Dev_0_7_Thunk() {
+  return &g_ppb_printing_dev_thunk_0_7;
 }
 
 }  // namespace thunk