services/ui: Detect when a video is playing

cc/ipc/struct_traits_unittest.cc

Index: cc/ipc/struct_traits_unittest.cc
diff --git a/cc/ipc/struct_traits_unittest.cc b/cc/ipc/struct_traits_unittest.cc
index 7f49066890113247456814e00af77f54399eca57..7d70e75a22da9c25ad6bdd766d7695f56cc2954c 100644
--- a/cc/ipc/struct_traits_unittest.cc
+++ b/cc/ipc/struct_traits_unittest.cc
@@ -267,6 +267,7 @@ TEST_F(StructTraitsTest, CompositorFrameMetadata) {
   const float max_page_scale_factor = 4.6f;
   const bool root_overflow_x_hidden = true;
   const bool root_overflow_y_hidden = true;
+  const bool may_contain_video = true;
   const bool is_resourceless_software_draw_with_scroll_or_animation = true;
   const gfx::Vector2dF location_bar_offset(1234.5f, 5432.1f);
   const gfx::Vector2dF location_bar_content_translation(1234.5f, 5432.1f);
@@ -301,6 +302,7 @@ TEST_F(StructTraitsTest, CompositorFrameMetadata) {
   input.max_page_scale_factor = max_page_scale_factor;
   input.root_overflow_x_hidden = root_overflow_x_hidden;
   input.root_overflow_y_hidden = root_overflow_y_hidden;
+  input.may_contain_video = may_contain_video;
   input.is_resourceless_software_draw_with_scroll_or_animation =
       is_resourceless_software_draw_with_scroll_or_animation;
   input.location_bar_offset = location_bar_offset;
@@ -323,6 +325,7 @@ TEST_F(StructTraitsTest, CompositorFrameMetadata) {
   EXPECT_EQ(max_page_scale_factor, output.max_page_scale_factor);
   EXPECT_EQ(root_overflow_x_hidden, output.root_overflow_x_hidden);
   EXPECT_EQ(root_overflow_y_hidden, output.root_overflow_y_hidden);
+  EXPECT_EQ(may_contain_video, output.may_contain_video);
   EXPECT_EQ(is_resourceless_software_draw_with_scroll_or_animation,
             output.is_resourceless_software_draw_with_scroll_or_animation);
   EXPECT_EQ(location_bar_offset, output.location_bar_offset);