Send compositor frame IPC with metadata.

content/browser/android/content_startup_flags.cc

Index: content/browser/android/content_startup_flags.cc
diff --git a/content/browser/android/content_startup_flags.cc b/content/browser/android/content_startup_flags.cc
index 16beb8fcaa4ee3c9d3880cdf0709adf883595a7b..c22bed578cb5337cb0a64b4fc65cc2dbf93f00fc 100644
--- a/content/browser/android/content_startup_flags.cc
+++ b/content/browser/android/content_startup_flags.cc
@@ -7,6 +7,7 @@
 #include "base/string_number_conversions.h"
 #include "base/command_line.h"
 #include "base/logging.h"
+#include "cc/switches.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/common/content_switches.h"
@@ -60,6 +61,9 @@ void SetContentCommandLineFlags(int max_render_process_count) {
   // Always use fixed layout and viewport tag.
   parsed_command_line->AppendSwitch(switches::kEnableFixedLayout);
   parsed_command_line->AppendSwitch(switches::kEnableViewport);
+
+  parsed_command_line->AppendSwitch(
+      cc::switches::kEnableCompositorFrameMessage);
 }
 
 }  // namespace content