Brotli compression used on about credits html file.

chrome/browser/ui/webui/about_ui.cc

Index: chrome/browser/ui/webui/about_ui.cc
diff --git a/chrome/browser/ui/webui/about_ui.cc b/chrome/browser/ui/webui/about_ui.cc
index 8985b91ff58f3365d4af76296cd37b23d6756a45..2b3f3e67dfc786ca59b6323610f44c460ee3d6fd 100644
--- a/chrome/browser/ui/webui/about_ui.cc
+++ b/chrome/browser/ui/webui/about_ui.cc
@@ -63,6 +63,7 @@
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
+#include "third_party/brotli/dec/decode.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/jstemplate_builder.h"
@@ -760,8 +761,25 @@ void AboutUIHTMLSource::StartDataRequest(
       idr = IDR_KEYBOARD_UTILS_JS;
 #endif
 
-    response = ResourceBundle::GetSharedInstance().GetRawDataResource(
-        idr).as_string();
+    base::StringPiece raw_response =
+        ResourceBundle::GetSharedInstance().GetRawDataResource(idr);
+    if (idr == IDR_ABOUT_UI_CREDITS_HTML) {
+      size_t decoded_size;
+      const uint8_t* encoded_response_buffer =
+          reinterpret_cast<const uint8_t*>(raw_response.data());
+      CHECK(BrotliDecompressedSize(raw_response.size(), encoded_response_buffer,
+                                   &decoded_size));
+
+      // Resizing the response and using it as the buffer Brotli decompresses
+      // into.
+      response.resize(decoded_size);
+      CHECK(BrotliDecompressBuffer(raw_response.size(), encoded_response_buffer,
+                                   &decoded_size,
+                                   reinterpret_cast<uint8_t*>(&response[0])) ==
+            BROTLI_RESULT_SUCCESS);
+    } else {
+      response = raw_response.as_string();
+    }
 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
   } else if (source_name_ == chrome::kChromeUIDiscardsHost) {
     response = AboutDiscards(path);