Factor DRP PreviewsState logic out of content

content/renderer/previews_state_helper_unittest.cc

Index: content/renderer/previews_state_helper_unittest.cc
diff --git a/content/renderer/previews_state_helper_unittest.cc b/content/renderer/previews_state_helper_unittest.cc
deleted file mode 100644
index cd6c38f8f22e4c41c36ccd41085f73fc1717d53e..0000000000000000000000000000000000000000
--- a/content/renderer/previews_state_helper_unittest.cc
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright 2017 The Chromium 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 "content/renderer/previews_state_helper.h"
-#include "content/public/common/previews_state.h"
-#include "testing/gtest/include/gtest/gtest.h"
-#include "third_party/WebKit/public/platform/WebURLResponse.h"
-
-namespace content {
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateNoServerTransformRequested) {
-  blink::WebURLResponse response_no_headers;
-
-  // No transforms specified.
-  EXPECT_EQ(PREVIEWS_OFF, GetPreviewsStateFromMainFrameResponse(
-                              PREVIEWS_UNSPECIFIED, response_no_headers));
-
-  // Client Lo-Fi preserved if no Server Lo-Fi nor Lite Page.
-  EXPECT_EQ(CLIENT_LOFI_ON, GetPreviewsStateFromMainFrameResponse(
-                                CLIENT_LOFI_ON, response_no_headers));
-}
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateNoTransformResponseHeaders) {
-  blink::WebURLResponse response_no_headers;
-  // Lite Page enabled but no CPCT nor page-polices => all cleared.
-  EXPECT_EQ(PREVIEWS_OFF,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-                response_no_headers));
-  EXPECT_EQ(PREVIEWS_OFF, GetPreviewsStateFromMainFrameResponse(
-                              SERVER_LITE_PAGE_ON, response_no_headers));
-  EXPECT_EQ(PREVIEWS_OFF,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | CLIENT_LOFI_ON, response_no_headers));
-  EXPECT_EQ(PREVIEWS_OFF,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON, response_no_headers));
-
-  // Legacy Lo-Fi path (Lite Pages not enabled but Server Lo-Fi is).
-  EXPECT_EQ(SERVER_LOFI_ON, GetPreviewsStateFromMainFrameResponse(
-                                SERVER_LOFI_ON, response_no_headers));
-  EXPECT_EQ(SERVER_LOFI_ON | CLIENT_LOFI_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LOFI_ON | CLIENT_LOFI_ON, response_no_headers));
-}
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateLitePageTransform) {
-  blink::WebURLResponse response_with_lite_page;
-  response_with_lite_page.AddHTTPHeaderField("chrome-proxy-content-transform",
-                                             "lite-page");
-  EXPECT_EQ(SERVER_LITE_PAGE_ON,
-            GetPreviewsStateFromMainFrameResponse(SERVER_LITE_PAGE_ON,
-                                                  response_with_lite_page));
-  EXPECT_EQ(SERVER_LITE_PAGE_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-                response_with_lite_page));
-  EXPECT_EQ(SERVER_LITE_PAGE_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | CLIENT_LOFI_ON, response_with_lite_page));
-  EXPECT_EQ(SERVER_LITE_PAGE_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON, response_with_lite_page));
-}
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateLitePageAndLoFiTransforms) {
-  blink::WebURLResponse response_with_lite_page_and_page_policy;
-  response_with_lite_page_and_page_policy.AddHTTPHeaderField(
-      "chrome-proxy-content-transform", "lite-page");
-  response_with_lite_page_and_page_policy.AddHTTPHeaderField(
-      "Chrome-Proxy", "Page-Policies=Empty-Image");
-
-  response_with_lite_page_and_page_policy.AddHTTPHeaderField(
-      "Chrome-Proxy", "Page-Policies=Empty-Image");
-  EXPECT_EQ(SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-                response_with_lite_page_and_page_policy));
-  EXPECT_EQ(SERVER_LITE_PAGE_ON | SERVER_LOFI_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON,
-                response_with_lite_page_and_page_policy));
-}
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateLoFiFallbackPagePolicy) {
-  blink::WebURLResponse response_with_page_policy;
-  response_with_page_policy.AddHTTPHeaderField("Chrome-Proxy", "SomeNoise");
-  response_with_page_policy.AddHTTPHeaderField("Chrome-Proxy",
-                                               "Page-Policies=Empty-Image");
-
-  // No fallbacks if Server Lo-Fi not enabled.
-  EXPECT_EQ(PREVIEWS_OFF, GetPreviewsStateFromMainFrameResponse(
-                              SERVER_LITE_PAGE_ON, response_with_page_policy));
-  EXPECT_EQ(PREVIEWS_OFF, GetPreviewsStateFromMainFrameResponse(
-                              SERVER_LITE_PAGE_ON | CLIENT_LOFI_ON,
-                              response_with_page_policy));
-
-  // Lo-Fi fallbacks if Server Lo-Fi enabled and get empty-image directive.
-  EXPECT_EQ(SERVER_LOFI_ON | CLIENT_LOFI_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-                response_with_page_policy));
-  EXPECT_EQ(SERVER_LOFI_ON, GetPreviewsStateFromMainFrameResponse(
-                                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON,
-                                response_with_page_policy));
-}
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateLoFiFallbackAndOtherPolicies) {
-  blink::WebURLResponse response_with_page_policy;
-  response_with_page_policy.AddHTTPHeaderField("chrome-proxy", "Prefix=Noise");
-  response_with_page_policy.AddHTTPHeaderField(
-      "chrome-proxy", "page-policies=new-hotness|empty-image|newer-hotness");
-  response_with_page_policy.AddHTTPHeaderField("chrome-proxy",
-                                               "Suffix=More|Noise");
-
-  // Lo-Fi fallbacks if Server Lo-Fi enabled and get empty-image directive.
-  EXPECT_EQ(SERVER_LOFI_ON | CLIENT_LOFI_ON,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-                response_with_page_policy));
-  EXPECT_EQ(SERVER_LOFI_ON, GetPreviewsStateFromMainFrameResponse(
-                                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON,
-                                response_with_page_policy));
-}
-
-TEST(PreviewsStateHelperTest, GetPreviewsStateNoKnownPolicies) {
-  blink::WebURLResponse response_with_page_policy;
-  response_with_page_policy.AddHTTPHeaderField("chrome-proxy", "Prefix=Noise");
-  response_with_page_policy.AddHTTPHeaderField(
-      "chrome-proxy",
-      "page-policies=new-hotness|new-empty-image|newer-hotness");
-  response_with_page_policy.AddHTTPHeaderField("chrome-proxy",
-                                               "Suffix=More|Noise");
-
-  // Lo-Fi fallbacks if Server Lo-Fi enabled and get empty-image directive.
-  EXPECT_EQ(PREVIEWS_OFF,
-            GetPreviewsStateFromMainFrameResponse(
-                SERVER_LITE_PAGE_ON | SERVER_LOFI_ON | CLIENT_LOFI_ON,
-                response_with_page_policy));
-  EXPECT_EQ(PREVIEWS_OFF, GetPreviewsStateFromMainFrameResponse(
-                              SERVER_LITE_PAGE_ON | SERVER_LOFI_ON,
-                              response_with_page_policy));
-}
-
-}  // namespace content