Adds PrintingContext implementation stub for Android.

printing/printed_document.cc

Index: printing/printed_document.cc
diff --git a/printing/printed_document.cc b/printing/printed_document.cc
index 6e912a11be9ed2b7f05df2c8a1d11074705a2e01..1e2fa11e4ba022d6b992a0b430126dec6c95ffb2 100644
--- a/printing/printed_document.cc
+++ b/printing/printed_document.cc
@@ -225,8 +225,8 @@ PrintedDocument::Immutable::Immutable(const PrintSettings& settings,
 PrintedDocument::Immutable::~Immutable() {
 }
 
-#if defined(OS_POSIX) && defined(USE_AURA)
-// This function is not used on aura linux/chromeos.
+#if defined(OS_POSIX) && (defined(USE_AURA) || defined(OS_ANDROID))
+// This function is not used on aura linux/chromeos or android.
 void PrintedDocument::RenderPrintedPage(const PrintedPage& page,
                                         PrintingContext* context) const {
 }