Don't update the surface range at every activation

Updating the fallback lowerbound is not necessary anymore and will just
waste time by causing an unnecessary commit and draw.

Bug: 870456
Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel
Change-Id: Icd553c179c5a2eb98c1608524d9c1caf42a27835
Reviewed-on: https://chromium-review.googlesource.com/1226366
Commit-Queue: Saman Sami <samans@chromium.org>
Reviewed-by: Khushal <khushalsagar@chromium.org>
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#594380}

components/viz/service/frame_sinks/direct_layer_tree_frame_sink.cc

@@ -132,15 +132,6 @@ static HitTestRegionList CreateHitTestData(const CompositorFrame& frame) {
         const SurfaceDrawQuad* surface_quad =
             SurfaceDrawQuad::MaterialCast(quad);
 
-        // Skip the quad if the FrameSinkId between fallback and primary is not
-        // the same, because we don't know which FrameSinkId would be used to
-        // draw this quad.
-        if (surface_quad->surface_range.start() &&
-            surface_quad->surface_range.start()->frame_sink_id() !=
-                surface_quad->surface_range.end().frame_sink_id()) {
-          continue;
-        }
-
         // Skip the quad if the transform is not invertible (i.e. it will not
         // be able to receive events).
         gfx::Transform target_to_quad_transform;

content/browser/renderer_host/delegated_frame_host.cc

@@ -149,7 +149,7 @@ void DelegatedFrameHost::ProcessCopyOutputRequest(
 }
 
 bool DelegatedFrameHost::CanCopyFromCompositingSurface() const {
-  return HasFallbackSurface() && active_device_scale_factor_ != 0.f;
+  return active_device_scale_factor_ != 0.f;
 }
 
 bool DelegatedFrameHost::TransformPointToLocalCoordSpaceLegacy(
@@ -330,8 +330,6 @@ void DelegatedFrameHost::OnFirstSurfaceActivation(
     return;
   }
 
-  client_->DelegatedFrameHostGetLayer()->SetFallbackSurfaceId(
-      surface_info.id());
   active_local_surface_id_ = surface_info.id().local_surface_id();
   active_device_scale_factor_ = surface_info.device_scale_factor();
 

content/browser/renderer_host/render_widget_host_view_aura.cc

@@ -1698,8 +1698,6 @@ bool RenderWidgetHostViewAura::TransformPointToCoordSpaceForView(
   // In TransformPointToLocalCoordSpace() there is a Point-to-Pixel conversion,
   // but it is not necessary here because the final target view is responsible
   // for converting before computing the final transform.
-  if (!HasFallbackSurface())
-    return false;
   return target_view->TransformPointToLocalCoordSpace(
       point, GetCurrentSurfaceId(), transformed_point, source);
 }

content/browser/renderer_host/render_widget_host_view_aura_unittest.cc

@@ -3428,8 +3428,7 @@ TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest,
   EXPECT_FALSE(view_->HasFallbackSurface());
 }
 
-// This test verifies that the primary SurfaceId is populated on resize and
-// the fallback SurfaceId is populated in OnFirstSurfaceActivation.
+// This test verifies that the primary SurfaceId is populated on resize.
 TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest, SurfaceChanges) {
   // Early out because DelegatedFrameHost is not used in mash.
   if (features::IsMultiProcessMash())
@@ -3445,25 +3444,8 @@ TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest, SurfaceChanges) {
   view_->SetSize(gfx::Size(300, 300));
   ASSERT_TRUE(view_->HasPrimarySurface());
   EXPECT_EQ(gfx::Size(300, 300), view_->window_->layer()->size());
-  EXPECT_FALSE(view_->HasFallbackSurface());
   EXPECT_EQ(gfx::Size(300, 300),
             view_->delegated_frame_host_->CurrentFrameSizeInDipForTesting());
-
-  // Resizing should update the primary SurfaceId.
-  view_->SetSize(gfx::Size(400, 400));
-  EXPECT_EQ(gfx::Size(400, 400), view_->window_->layer()->size());
-  EXPECT_EQ(nullptr, view_->window_->layer()->GetFallbackSurfaceId());
-  EXPECT_EQ(gfx::Size(400, 400),
-            view_->delegated_frame_host_->CurrentFrameSizeInDipForTesting());
-
-  // Fallback SurfaceId should be updated in OnFirstSurfaceActivation.
-  // Submitting a CompositorFrame should update the fallback SurfaceId
-  viz::SurfaceId surface_id(view_->GetFrameSinkId(),
-                            view_->GetLocalSurfaceId());
-  view_->delegated_frame_host_->OnFirstSurfaceActivation(
-      viz::SurfaceInfo(surface_id, 1.f, gfx::Size(400, 400)));
-  EXPECT_EQ(gfx::Size(400, 400), view_->window_->layer()->size());
-  EXPECT_EQ(surface_id, *view_->window_->layer()->GetFallbackSurfaceId());
 }
 
 // This test verifies that the primary SurfaceId is updated on device scale
@@ -3660,7 +3642,8 @@ TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest,
 
   // Make [1] hidden, resize it. It should drop its frame.
   views[1]->Hide();
-  EXPECT_TRUE(views[1]->HasFallbackSurface());
+  // TODO(samans): Fix this expectation once https://crbug.com/878372 is fixed.
+  EXPECT_FALSE(views[1]->HasFallbackSurface());
   gfx::Size size2(200, 200);
   views[1]->SetSize(size2);
   EXPECT_FALSE(views[1]->HasFallbackSurface());
@@ -5933,7 +5916,9 @@ TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest,
   viz::LocalSurfaceId id1 = view_->GetLocalSurfaceId();
   view_->delegated_frame_host_->OnFirstSurfaceActivation(viz::SurfaceInfo(
       viz::SurfaceId(view_->GetFrameSinkId(), id1), 1, gfx::Size(20, 20)));
-  EXPECT_TRUE(view_->window_->layer()->GetFallbackSurfaceId()->is_valid());
+  // TODO(samans): Fix these expectations once https://crbug.com/878372 is
+  // fixed.
+  EXPECT_FALSE(view_->window_->layer()->GetFallbackSurfaceId());
   view_->Hide();
   view_->SetSize(gfx::Size(54, 32));
   view_->Show();
@@ -5956,10 +5941,12 @@ TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest,
   viz::LocalSurfaceId id1 = view_->GetLocalSurfaceId();
   view_->delegated_frame_host_->OnFirstSurfaceActivation(viz::SurfaceInfo(
       viz::SurfaceId(view_->GetFrameSinkId(), id1), 1, gfx::Size(20, 20)));
-  EXPECT_TRUE(view_->window_->layer()->GetFallbackSurfaceId()->is_valid());
+  // TODO(samans): Fix these expectations once https://crbug.com/878372 is
+  // fixed.
+  EXPECT_FALSE(view_->window_->layer()->GetFallbackSurfaceId());
   view_->Hide();
   view_->Show();
-  EXPECT_TRUE(view_->window_->layer()->GetFallbackSurfaceId()->is_valid());
+  EXPECT_FALSE(view_->window_->layer()->GetFallbackSurfaceId());
 }
 
 // Check that TakeFallbackContentFrom() copies the fallback SurfaceId and
@@ -5984,16 +5971,10 @@ TEST_F(RenderWidgetHostViewAuraSurfaceSynchronizationTest,
       view2->GetNativeView(), parent_view_->GetNativeView()->GetRootWindow(),
       gfx::Rect());
 
-  // Set fallback for the first view.
-  viz::LocalSurfaceId id = view_->GetLocalSurfaceId();
-  view_->delegated_frame_host_->OnFirstSurfaceActivation(viz::SurfaceInfo(
-      viz::SurfaceId(view_->GetFrameSinkId(), id), 1, gfx::Size(20, 20)));
-  EXPECT_TRUE(view_->window_->layer()->GetFallbackSurfaceId()->is_valid());
-
-  // Call TakeFallbackContentFrom(). The second view should now have the same
-  // fallback as the first view.
+  // Call TakeFallbackContentFrom(). The second view should obtain a fallback
+  // from the first view.
   view2->TakeFallbackContentFrom(view_);
-  EXPECT_EQ(*view_->window_->layer()->GetFallbackSurfaceId(),
+  EXPECT_EQ(view_->window_->layer()->GetPrimarySurfaceId()->ToSmallestId(),
             *view2->window_->layer()->GetFallbackSurfaceId());
 
   DestroyView(view2);

content/browser/renderer_host/render_widget_host_view_mac.mm

@@ -1259,8 +1259,6 @@ bool RenderWidgetHostViewMac::TransformPointToCoordSpaceForView(
     return true;
   }
 
-  if (!HasFallbackSurface())
-    return false;
   return target_view->TransformPointToLocalCoordSpace(
       point, GetCurrentSurfaceId(), transformed_point, source);
 }

ui/android/delegated_frame_host_android.cc

@@ -177,9 +177,7 @@ void DelegatedFrameHostAndroid::CopyFromCompositingSurface(
 }
 
 bool DelegatedFrameHostAndroid::CanCopyFromCompositingSurface() const {
-  return content_layer_ && content_layer_->fallback_surface_id() &&
-         content_layer_->fallback_surface_id()->is_valid() &&
-         view_->GetWindowAndroid() &&
+  return pending_local_surface_id_.is_valid() && view_->GetWindowAndroid() &&
          view_->GetWindowAndroid()->GetCompositor();
 }
 
@@ -405,7 +403,6 @@ void DelegatedFrameHostAndroid::OnFirstSurfaceActivation(
     return;
   }
 
-  content_layer_->SetFallbackSurfaceId(surface_info.id());
   active_local_surface_id_ = surface_info.id().local_surface_id();
   active_device_scale_factor_ = surface_info.device_scale_factor();
 
@@ -465,9 +462,7 @@ void DelegatedFrameHostAndroid::ProcessCopyOutputRequest(
 }
 
 viz::SurfaceId DelegatedFrameHostAndroid::SurfaceId() const {
-  return content_layer_ && content_layer_->fallback_surface_id()
-             ? *content_layer_->fallback_surface_id()
-             : viz::SurfaceId();
+  return viz::SurfaceId(frame_sink_id_, active_local_surface_id_);
 }
 
 bool DelegatedFrameHostAndroid::HasPrimarySurface() const {