Index: content/renderer/previews_state_helper.cc |
diff --git a/content/renderer/previews_state_helper.cc b/content/renderer/previews_state_helper.cc |
deleted file mode 100644 |
index 4528f370136c9731d3f63061efc6aa8f2efb8c9a..0000000000000000000000000000000000000000 |
--- a/content/renderer/previews_state_helper.cc |
+++ /dev/null |
@@ -1,100 +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 <string> |
- |
-#include "base/macros.h" |
-#include "base/strings/string_piece.h" |
-#include "base/strings/string_split.h" |
-#include "base/strings/string_util.h" |
-#include "third_party/WebKit/public/platform/WebString.h" |
- |
-namespace content { |
- |
-namespace { |
- |
-// Chrome Proxy Previews header and directives. |
-const char kChromeProxyHeader[] = "chrome-proxy"; |
-const char kChromeProxyContentTransformHeader[] = |
- "chrome-proxy-content-transform"; |
-const char kChromeProxyPagePoliciesDirective[] = "page-policies"; |
-const char kChromeProxyEmptyImageDirective[] = "empty-image"; |
-const char kChromeProxyLitePageDirective[] = "lite-page"; |
- |
-bool HasEmptyImageDirective(const blink::WebURLResponse& web_url_response) { |
- std::string chrome_proxy_value = |
- web_url_response |
- .HttpHeaderField(blink::WebString::FromUTF8(kChromeProxyHeader)) |
- .Utf8(); |
- for (const auto& directive : |
- base::SplitStringPiece(chrome_proxy_value, ",", base::TRIM_WHITESPACE, |
- base::SPLIT_WANT_NONEMPTY)) { |
- if (!base::StartsWith(directive, kChromeProxyPagePoliciesDirective, |
- base::CompareCase::INSENSITIVE_ASCII)) { |
- continue; |
- } |
- |
- // Check policy directive for empty-image entry. |
- base::StringPiece page_policies_value = base::StringPiece(directive).substr( |
- arraysize(kChromeProxyPagePoliciesDirective)); |
- for (const auto& policy : |
- base::SplitStringPiece(page_policies_value, "|", base::TRIM_WHITESPACE, |
- base::SPLIT_WANT_NONEMPTY)) { |
- if (base::LowerCaseEqualsASCII(policy, kChromeProxyEmptyImageDirective)) { |
- return true; |
- } |
- } |
- } |
- return false; |
-} |
- |
-} // namespace |
- |
-PreviewsState GetPreviewsStateFromMainFrameResponse( |
- PreviewsState original_state, |
- const blink::WebURLResponse& web_url_response) { |
- if (original_state == PREVIEWS_UNSPECIFIED) { |
- return PREVIEWS_OFF; |
- } |
- |
- // Don't update the state if server previews were not enabled. |
- if (!(original_state & SERVER_LITE_PAGE_ON)) { |
- return original_state; |
- } |
- |
- // At this point, this is a proxy main frame response for which the |
- // PreviewsState needs to be updated from what was enabled/accepted by the |
- // client to what the client should actually do based on the server response. |
- |
- PreviewsState updated_state = original_state; |
- |
- // Clear the Lite Page bit if Lite Page transformation did not occur. |
- if (web_url_response |
- .HttpHeaderField( |
- blink::WebString::FromUTF8(kChromeProxyContentTransformHeader)) |
- .Utf8() != kChromeProxyLitePageDirective) { |
- updated_state &= ~(SERVER_LITE_PAGE_ON); |
- } |
- |
- // Determine whether to keep or clear Lo-Fi bits. We need to receive the |
- // empty-image policy directive and have SERVER_LOFI_ON in order to retain |
- // Lo-Fi bits. |
- if (!(original_state & SERVER_LOFI_ON)) { |
- // Server Lo-Fi not enabled so ensure Client Lo-Fi off for this request. |
- updated_state &= ~(CLIENT_LOFI_ON); |
- } else if (!HasEmptyImageDirective(web_url_response)) { |
- updated_state &= ~(SERVER_LOFI_ON | CLIENT_LOFI_ON); |
- } |
- |
- // If we are left with no previews bits set, return the off state. |
- if (updated_state == PREVIEWS_UNSPECIFIED) { |
- return PREVIEWS_OFF; |
- } |
- |
- return updated_state; |
-} |
- |
-} // namespace content |