cc: Add kDisableGpuRasterization to content_shell for layout tests

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 98cbf615da9a4bcb4b89c62b4f95a5ae5e37296e..0696d1e2a0c5090464033da4188e1193e8aecca9 100644
--- a/content/browser/gpu/compositor_util.cc
+++ b/content/browser/gpu/compositor_util.cc
@@ -285,7 +285,13 @@ bool IsGpuRasterizationEnabled() {
     return false;
   }
 
+#if defined(OS_ANDROID)
   return true;
+#endif
+
+  // explicitly disable GPU rasterization on all non-android devices until we
+  // have full test coverage.
+  return false;
 }
 
 bool IsForceGpuRasterizationEnabled() {