Use SwapBuffersWithBounds on Chromecast

cc/output/overlay_strategy_underlay_cast.cc

Index: cc/output/overlay_strategy_underlay_cast.cc
diff --git a/cc/output/overlay_strategy_underlay_cast.cc b/cc/output/overlay_strategy_underlay_cast.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3023b1695e3226eae145f799fd2a40f5ec782e71
--- /dev/null
+++ b/cc/output/overlay_strategy_underlay_cast.cc
@@ -0,0 +1,72 @@
+// Copyright 2017 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 "cc/output/overlay_strategy_underlay_cast.h"
+
+#include "base/containers/adapters.h"
+#include "cc/quads/draw_quad.h"
+#include "cc/quads/solid_color_draw_quad.h"
+#include "ui/gfx/geometry/rect_conversions.h"
+
+namespace cc {
+
+OverlayStrategyUnderlayCast::OverlayStrategyUnderlayCast(
+    OverlayCandidateValidator* capability_checker)
+    : OverlayStrategyUnderlay(capability_checker) {}
+
+OverlayStrategyUnderlayCast::~OverlayStrategyUnderlayCast() {}
+
+bool OverlayStrategyUnderlayCast::Attempt(
+    ResourceProvider* resource_provider,
+    RenderPass* render_pass,
+    OverlayCandidateList* candidate_list) {
+  const QuadList& const_quad_list = render_pass->quad_list;
+  bool found_underlay = false;
+  gfx::Rect content_bounds;
+  for (const auto* quad : base::Reversed(const_quad_list)) {
+    if (OverlayCandidate::IsInvisibleQuad(quad))
+      continue;
+
+    const auto& transform = quad->shared_quad_state->quad_to_target_transform;
+    gfx::RectF quad_rect = gfx::RectF(quad->rect);
+    transform.TransformRect(&quad_rect);
+
+    bool is_underlay = false;
+    if (!found_underlay) {
+      OverlayCandidate candidate;
+      is_underlay =
+          OverlayCandidate::FromDrawQuad(resource_provider, quad, &candidate);
+      found_underlay |= is_underlay;
+    }
+
+    if (!found_underlay && quad->material == DrawQuad::SOLID_COLOR) {
+      const SolidColorDrawQuad* solid = SolidColorDrawQuad::MaterialCast(quad);
+      if (solid->color == SK_ColorBLACK)
+        continue;
+    }
+
+    if (is_underlay) {
+      content_bounds.Subtract(ToEnclosedRect(quad_rect));
+    } else {
+      content_bounds.Union(ToEnclosingRect(quad_rect));
+    }
+  }
+
+  if (found_underlay) {
+    content_bounds_.resize(1);
+    content_bounds_[0] = content_bounds;
+  } else {
+    content_bounds_.clear();
+  }
+  return OverlayStrategyUnderlay::Attempt(resource_provider, render_pass,
+                                          candidate_list);
+}
+
+void OverlayStrategyUnderlayCast::GetContentBounds(
+    std::vector<gfx::Rect>* bounds) {
+  DCHECK(bounds);
+  bounds->insert(bounds->end(), content_bounds_.begin(), content_bounds_.end());
+}
+
+}  // namespace cc