Enable delegated rendering on Aura Windows and Linux (not Chrome OS)

content/browser/gpu/compositor_util.cc

Index: content/browser/gpu/compositor_util.cc
diff --git a/content/browser/gpu/compositor_util.cc b/content/browser/gpu/compositor_util.cc
index 16810e326f32facca9cdafde9f2b2fb2e490c1d3..b764a0385aa3256300561ec91100c68182a1392c 100644
--- a/content/browser/gpu/compositor_util.cc
+++ b/content/browser/gpu/compositor_util.cc
@@ -112,6 +112,12 @@ bool IsDelegatedRendererEnabled() {
   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
   bool enabled = false;
 
+#if defined(USE_AURA) && !defined(OS_CHROMEOS)
+  // Enable on non-ChromeOS Aura. Chrome OS has driver issues on some platforms:
+  // https://code.google.com/p/chrome-os-partner/issues/detail?id=22688
+  enabled = true;
+#endif
+
   // Flags override.
   enabled |= command_line.HasSwitch(switches::kEnableDelegatedRenderer);
   enabled &= !command_line.HasSwitch(switches::kDisableDelegatedRenderer);