Disable SkiaRenderer on low memory devices

UMA data suggests that we never draw frames on Mali-400 with <= 512 MB.
This is probably inability to use RGB565 framebuffer.

Disabling SkiaRenderer until this is fixed.

Bug: 1126490
Change-Id: Id9081cb178febc54d612498b8344286bd76643a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2416722
Commit-Queue: Jonathan Backer <backer@chromium.org>
Auto-Submit: Jonathan Backer <backer@chromium.org>
Reviewed-by: Vasiliy Telezhnikov <vasilyt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808041}

components/viz/common/features.cc

@@ -5,6 +5,7 @@
 #include "components/viz/common/features.h"
 
 #include "base/command_line.h"
+#include "base/system/sys_info.h"
 #include "build/chromecast_buildflags.h"
 #include "components/viz/common/switches.h"
 #include "components/viz/common/viz_utils.h"
@@ -114,6 +115,10 @@ bool IsUsingSkiaRenderer() {
   if (IsUsingVizForWebView())
     return true;
 
+  // https://crbug.com/1126490 Mali-400 with <= 512 MB is currently broken.
+  if (base::SysInfo::AmountOfPhysicalMemoryMB() <= 512)
+    return false;
+
   return base::FeatureList::IsEnabled(kUseSkiaRenderer) ||
          base::FeatureList::IsEnabled(kVulkan);
 }