cc: Prevent allocating memory buffers too large in tests.

cc/layers/scrollbar_layer_unittest.cc

Index: cc/layers/scrollbar_layer_unittest.cc
diff --git a/cc/layers/scrollbar_layer_unittest.cc b/cc/layers/scrollbar_layer_unittest.cc
index 45995fc9fd894706ae74623c85266d0dc80c97a0..54ff4223fd27d9144a781540d73fc9cf778fa552 100644
--- a/cc/layers/scrollbar_layer_unittest.cc
+++ b/cc/layers/scrollbar_layer_unittest.cc
@@ -1007,9 +1007,13 @@ TEST_F(ScaledScrollbarLayerTestResourceCreation, ScaledResourceUpload) {
   // Try something extreme to be larger than max texture size, and make it a
   // non-integer for funsies.
   scoped_refptr<TestContextProvider> context = TestContextProvider::Create();
+  // Keep the max texture size reasonable so we don't OOM on low end devices
+  // (crbug.com/642333).
+  context->UnboundTestContext3d()->set_max_texture_size(512);
   context->BindToCurrentThread();
   int max_texture_size = 0;
   context->ContextGL()->GetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size);
+  EXPECT_EQ(512, max_texture_size);
   TestResourceUpload(max_texture_size / 9.9f);
 }