Disable CA compositor if there are too many quads.

cc/output/overlay_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "cc/base/region.h"
@@ skipping 1865 matching lines @@
 TEST_F(CALayerOverlayRPDQTest, RenderPassDrawQuadUnsupportedFilter) {
   filters_.Append(FilterOperation::CreateZoomFilter(0.9f, 1));
   quad_->SetNew(pass_->shared_quad_state_list.back(), kOverlayRect,
                 kOverlayRect, render_pass_id_, 0, gfx::Vector2dF(), gfx::Size(),
                 filters_, gfx::Vector2dF(1, 1), gfx::PointF(),
                 background_filters_);
   ProcessForOverlays();
   EXPECT_EQ(0U, ca_layer_list_.size());
 }
 
+TEST_F(CALayerOverlayRPDQTest, TooManyRenderPassDrawQuads) {
+  filters_.Append(FilterOperation::CreateBlurFilter(0.8f));
+  int count = 35;
+
+  for (int i = 0; i < count; ++i) {
+    RenderPassDrawQuad* quad =
+        pass_->CreateAndAppendDrawQuad<RenderPassDrawQuad>();
+    quad->SetNew(pass_->shared_quad_state_list.back(), kOverlayRect,
+                 kOverlayRect, render_pass_id_, 2, gfx::Vector2dF(),
+                 gfx::Size(), filters_, gfx::Vector2dF(1, 1), gfx::PointF(),
+                 background_filters_);
+  }
+
+  ProcessForOverlays();
+  EXPECT_EQ(0U, ca_layer_list_.size());
+}
+
 }  // namespace
 }  // namespace cc