disable some tests to speed up the build

update readme

README.fedora

@@ -1,4 +1,9 @@
-Widevine is not a free library and cannot be shipped in fedora.
+- Widevine is not a free library and cannot be shipped in fedora.
   You have to get it from Google first and install it under
   /usr/lib64/chromium-browser or /opt/google/chrome if you want
   Chromium to use widevine.
+
+- Chromium uses the system ffmpeg-free library which is included in
+  fedora >= 36 and centos-stream 9. This library contains free video
+  codecs. If you want Chromium to use non-free video codecs, you need
+  to install ffmpeg-libs from rpmfussion-free.

chromium.spec

@@ -1259,7 +1259,8 @@ CHROMIUM_CORE_GN_DEFINES+=' use_custom_libcxx=false'
 CHROMIUM_CORE_GN_DEFINES+=' enable_iterator_debugging=false'
 CHROMIUM_CORE_GN_DEFINES+=' enable_js_type_check=false'
 CHROMIUM_CORE_GN_DEFINES+=' enable_vr=false'
-CHROMIUM_CORE_GN_DEFINES+=' build_dawn_tests=false'
+CHROMIUM_CORE_GN_DEFINES+=' build_dawn_tests=false enable_perfetto_unittests=false'
+CHROMIUM_CORE_GN_DEFINES+=' disable_fieldtrial_testing_config=true'
 CHROMIUM_CORE_GN_DEFINES+=' blink_symbol_level=0 symbol_level=0 v8_symbol_level=0'
 export CHROMIUM_CORE_GN_DEFINES
 
@@ -1392,7 +1393,9 @@ tools/gn/bootstrap/bootstrap.py --gn-gen-args="$CHROMIUM_CORE_GN_DEFINES $CHROMI
 %build_target %{headlessbuilddir} headless_shell
 %endif
 
-%build_target %{builddir} chrome chrome_sandbox chromedriver
+%build_target %{builddir} chrome
+%build_target %{builddir} chrome_sandbox
+%build_target %{builddir} chromedriver
 
 %if %{build_clear_key_cdm}
 %build_target %{builddir} clear_key_cdm