Add brotli content-encoding filter.

chrome/common/chrome_switches.cc

Index: chrome/common/chrome_switches.cc
diff --git a/chrome/common/chrome_switches.cc b/chrome/common/chrome_switches.cc
index a76cc807badd92ee51791dc1e297c2aa329f5130..899ca710472ab196a5646e07058895b7b195dde6 100644
--- a/chrome/common/chrome_switches.cc
+++ b/chrome/common/chrome_switches.cc
@@ -1328,6 +1328,12 @@ const char kDebugPrint[] = "debug-print";
 const char kDisableNewTaskManager[]   = "disable-new-task-manager";
 #endif  // defined(ENABLE_TASK_MANAGER)
 
+// Enables support for the Brotli Content-encoding.
+const char kEnableBrotli[]                  = "enable-brotli";
+
+// Disables support for the Brotli Content-encoding.
+const char kDisableBrotli[]                 = "disable-brotli";
+
 bool AboutInSettingsEnabled() {
   return SettingsWindowEnabled() &&
          !base::CommandLine::ForCurrentProcess()->HasSwitch(