Check dimensions and content of bitmaps in EmbedderTests.

core/fpdfapi/render/fpdf_render_loadimage_embeddertest.cpp

 // Copyright 2015 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "testing/embedder_test.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 class FPDFRenderLoadImageEmbeddertest : public EmbedderTest {};
 
 TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_554151) {
   // Test scanline downsampling with a BitsPerComponent of 4.
   // Should not crash.
   EXPECT_TRUE(OpenDocument("bug_554151.pdf"));
   FPDF_PAGE page = LoadPage(0);
   EXPECT_NE(nullptr, page);
   FPDF_BITMAP bitmap = RenderPage(page);
+  CompareBitmap(bitmap, 612, 792, "a14d7ee573c1b2456d7bf6b7762823cf");
   FPDFBitmap_Destroy(bitmap);
   UnloadPage(page);
 }
 
 TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_557223) {
   // Should not crash
   EXPECT_TRUE(OpenDocument("bug_557223.pdf"));
   FPDF_PAGE page = LoadPage(0);
   EXPECT_NE(nullptr, page);
   FPDF_BITMAP bitmap = RenderPage(page);
+  CompareBitmap(bitmap, 24, 24, "dc0ea1b743c2edb22c597cadc8537f7b");
   FPDFBitmap_Destroy(bitmap);
   UnloadPage(page);
 }
 
 TEST_F(FPDFRenderLoadImageEmbeddertest, Bug_603518) {
   // Should not crash
   EXPECT_TRUE(OpenDocument("bug_603518.pdf"));
   FPDF_PAGE page = LoadPage(0);
   EXPECT_NE(nullptr, page);
   FPDF_BITMAP bitmap = RenderPage(page);
+  CompareBitmap(bitmap, 749, 749, "b9e75190cdc5edf0069a408744ca07dc");
   FPDFBitmap_Destroy(bitmap);
   UnloadPage(page);
 }