Add ENABLE_PRINTING and disable it on Android.

webkit/plugins/ppapi/ppapi_plugin_instance.cc

Index: webkit/plugins/ppapi/ppapi_plugin_instance.cc
diff --git a/webkit/plugins/ppapi/ppapi_plugin_instance.cc b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
index 429dd03d4c65297cf1180a606232516017f62711..0507316dd2bab2382eb095e185fc0e0c2a1aa14c 100644
--- a/webkit/plugins/ppapi/ppapi_plugin_instance.cc
+++ b/webkit/plugins/ppapi/ppapi_plugin_instance.cc
@@ -1172,7 +1172,7 @@ bool PluginInstance::PrintPage(int page_number, WebKit::WebCanvas* canvas) {
   DCHECK(plugin_print_interface_);
   PP_PrintPageNumberRange_Dev page_range;
   page_range.first_page_number = page_range.last_page_number = page_number;
-#if defined(USE_SKIA)
+#if defined(USE_SKIA) && defined(ENABLE_PRINTING)

[Lei Zhang, 2012/06/08 19:08:41]

Why not just make PrintPage() simply return false if ENABLE_PRINTING is not set?
Similarly PrintBegin() can return 0, PrintEnd() can just return, and
PrintPageHelper() can be #ifdef'd out.

[Xianzhu, 2012/06/08 22:50:43]

Done.

[Lei Zhang, 2012/06/08 23:24:52]

This is fine, but you can also turn the other printing methods in this file into
dummy methods when printing is disabled. You can do it now or in a separate CL
later.

[Xianzhu, 2012/06/09 00:51:30]

Now added ifdef in PrintPDFOutput() which also uses printing:: symbols. Didn't
change that before because it won't break build without enable_printing.

   // The canvas only has a metafile on it for print preview.
   bool save_for_later =
       (printing::MetafileSkiaWrapper::GetMetafileFromCanvas(*canvas) != NULL);
@@ -1184,7 +1184,7 @@ bool PluginInstance::PrintPage(int page_number, WebKit::WebCanvas* canvas) {
     canvas_ = canvas;
     return true;
   } else
-#endif  // USE_SKIA
+#endif  // USE_SKIA && ENABLE_PRINTING
   {
     return PrintPageHelper(&page_range, 1, canvas);
   }