Add EmbedderTest::RenderPage().

Which in turn calls RenderPageWithFlags() with default arguments, so
callers do not have to write RenderPageWithFlags(new_page, nullptr, 0).

Change-Id: Ifc8d68b9200ab34c2a374305955f3527e7ffddba
Reviewed-on: https://pdfium-review.googlesource.com/c/49572
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/fpdfsdk/fpdf_ppo_embeddertest.cpp b/fpdfsdk/fpdf_ppo_embeddertest.cpp
index 4986d8b..8309a52 100644
--- a/fpdfsdk/fpdf_ppo_embeddertest.cpp
+++ b/fpdfsdk/fpdf_ppo_embeddertest.cpp
@@ -113,7 +113,7 @@
   for (int i = 0; i < kPageCount; ++i) {
     ScopedFPDFPage page(FPDF_LoadPage(output_doc_3up.get(), i));
     ASSERT_TRUE(page);
-    ScopedFPDFBitmap bitmap(RenderPageWithFlags(page.get(), nullptr, 0));
+    ScopedFPDFBitmap bitmap = RenderPage(page.get());
     EXPECT_EQ(792, FPDFBitmap_GetWidth(bitmap.get()));
     EXPECT_EQ(612, FPDFBitmap_GetHeight(bitmap.get()));
     EXPECT_EQ(kExpectedMD5s[i], HashBitmap(bitmap.get()));
@@ -245,7 +245,7 @@
     FPDF_PAGE page = FPDF_LoadPage(output_doc, i);
     ASSERT_TRUE(page);
 
-    ScopedFPDFBitmap bitmap = RenderPageWithFlags(page, nullptr, 0);
+    ScopedFPDFBitmap bitmap = RenderPage(page);
     ASSERT_EQ(200, FPDFBitmap_GetWidth(bitmap.get()));
     ASSERT_EQ(200, FPDFBitmap_GetHeight(bitmap.get()));
     ASSERT_EQ(800, FPDFBitmap_GetStride(bitmap.get()));
@@ -276,7 +276,7 @@
   EXPECT_EQ(1, FPDF_GetPageCount(new_doc));
   FPDF_PAGE new_page = FPDF_LoadPage(new_doc, 0);
   ASSERT_NE(nullptr, new_page);
-  ScopedFPDFBitmap new_bitmap = RenderPageWithFlags(new_page, nullptr, 0);
+  ScopedFPDFBitmap new_bitmap = RenderPage(new_page);
   ASSERT_EQ(200, FPDFBitmap_GetWidth(new_bitmap.get()));
   ASSERT_EQ(200, FPDFBitmap_GetHeight(new_bitmap.get()));
   ASSERT_EQ(800, FPDFBitmap_GetStride(new_bitmap.get()));