Remove the unused parts of PPB_PDF

ppapi/tests/test_pdf.cc

Index: ppapi/tests/test_pdf.cc
diff --git a/ppapi/tests/test_pdf.cc b/ppapi/tests/test_pdf.cc
index 7b12785e9802ca4255aa7ae4adae488dd987a401..1c20004ec58fcd345ccb172f7558fb18683777b4 100644
--- a/ppapi/tests/test_pdf.cc
+++ b/ppapi/tests/test_pdf.cc
@@ -32,20 +32,6 @@ std::string TestPDF::TestGetLocalizedString() {
   PASS();
 }
 
-std::string TestPDF::TestGetResourceImage() {
-  pp::ImageData data =
-      pp::PDF::GetResourceImage(instance_, PP_RESOURCEIMAGE_PDF_BUTTON_ZOOMIN);
-  ASSERT_EQ(43, data.size().width());
-  ASSERT_EQ(42, data.size().height());
-  for (int i = 0; i < data.size().width(); ++i) {
-    for (int j = 0; j < data.size().height(); ++j) {
-      pp::Point point(i, j);
-      ASSERT_NE(0, *data.GetAddr32(point));
-    }
-  }
-  PASS();
-}
-
 std::string TestPDF::TestGetV8ExternalSnapshotData() {
   const char* natives_data;
   const char* snapshot_data;