Add a flag to not start GPU process on browser startup

content/browser/browser_main_loop.cc

Index: content/browser/browser_main_loop.cc
diff --git a/content/browser/browser_main_loop.cc b/content/browser/browser_main_loop.cc
index ee37ebd34483caab1a3b51028501d6e15b9fff01..121a6371e05a8d73c6f6cf1d94c183dcb9834d35 100644
--- a/content/browser/browser_main_loop.cc
+++ b/content/browser/browser_main_loop.cc
@@ -1246,6 +1246,7 @@ int BrowserMainLoop::BrowserThreadsStarted() {
 #if defined(OS_ANDROID)
   // TODO(crbug.com/439322): This should be set to |true|.
   established_gpu_channel = false;
+  always_uses_gpu = ShouldStartGpuProcessOnBrowserStartup();
   BrowserGpuChannelHostFactory::Initialize(established_gpu_channel);
 #elif defined(USE_AURA) || defined(OS_MACOSX)
   established_gpu_channel = true;