Treat responses with legacy LoFi headers as LoFi images.

third_party/WebKit/Source/core/loader/resource/ImageResourceTest.cpp

Index: third_party/WebKit/Source/core/loader/resource/ImageResourceTest.cpp
diff --git a/third_party/WebKit/Source/core/loader/resource/ImageResourceTest.cpp b/third_party/WebKit/Source/core/loader/resource/ImageResourceTest.cpp
index 7107dcad2f4269c3e0619d93e0870eae2f42b11e..d8c8ff9294e1efb737d63d426873f0c53557b12f 100644
--- a/third_party/WebKit/Source/core/loader/resource/ImageResourceTest.cpp
+++ b/third_party/WebKit/Source/core/loader/resource/ImageResourceTest.cpp
@@ -547,6 +547,49 @@ TEST(ImageResourceTest, ReloadIfLoFiOrPlaceholderAfterFinished) {
       WebCachePolicy::BypassingCache);
 }
 
+TEST(ImageResourceTest, ReloadIfLoFiOrPlaceholderAfterFinishedWithOldHeaders) {
+  KURL testURL(ParsedURLString, kTestURL);
+  ScopedMockedURLLoad scopedMockedURLLoad(testURL, GetTestFilePath());
+  ResourceRequest request = ResourceRequest(testURL);
+  ImageResource* imageResource = ImageResource::create(request);
+  imageResource->setStatus(ResourceStatus::Pending);
+
+  std::unique_ptr<MockImageResourceObserver> observer =
+      MockImageResourceObserver::create(imageResource->getContent());
+  ResourceFetcher* fetcher = createFetcher();
+
+  // Send the image response.
+  ResourceResponse resourceResponse(KURL(), "image/jpeg", sizeof(kJpegImage),
+                                    nullAtom);
+  resourceResponse.addHTTPHeaderField("chrome-proxy", "q=low");
+
+  imageResource->responseReceived(resourceResponse, nullptr);
+  imageResource->appendData(reinterpret_cast<const char*>(kJpegImage),
+                            sizeof(kJpegImage));
+  imageResource->finish();
+  EXPECT_FALSE(imageResource->errorOccurred());
+  ASSERT_TRUE(imageResource->getContent()->hasImage());
+  EXPECT_FALSE(imageResource->getContent()->getImage()->isNull());
+  EXPECT_EQ(2, observer->imageChangedCount());
+  EXPECT_EQ(kJpegImageWidth, observer->imageWidthOnLastImageChanged());
+  // The observer should have been notified that the image load completed.
+  EXPECT_TRUE(observer->imageNotifyFinishedCalled());
+  EXPECT_EQ(kJpegImageWidth, observer->imageWidthOnImageNotifyFinished());
+  EXPECT_TRUE(imageResource->getContent()->getImage()->isBitmapImage());
+  EXPECT_EQ(kJpegImageWidth, imageResource->getContent()->getImage()->width());
+  EXPECT_EQ(kJpegImageHeight,
+            imageResource->getContent()->getImage()->height());
+
+  // Call reloadIfLoFiOrPlaceholderImage() after the image has finished loading.
+  imageResource->reloadIfLoFiOrPlaceholderImage(fetcher,
+                                                Resource::kReloadAlways);
+
+  EXPECT_EQ(3, observer->imageChangedCount());
+  testThatReloadIsStartedThenServeReload(
+      testURL, imageResource, imageResource->getContent(), observer.get(),
+      WebCachePolicy::BypassingCache);
+}
+
 TEST(ImageResourceTest,
      ReloadIfLoFiOrPlaceholderAfterFinishedWithoutLoFiHeaders) {
   KURL testURL(ParsedURLString, kTestURL);