cc: Use gpu raster in HUD.

cc/trees/layer_tree_host_unittest_context.cc

Index: cc/trees/layer_tree_host_unittest_context.cc
diff --git a/cc/trees/layer_tree_host_unittest_context.cc b/cc/trees/layer_tree_host_unittest_context.cc
index d1337cb99042ef9b839698dad997d09fd37cbf64..cf74b8c85c2a6c34f82857aab1471d9d89347e4b 100644
--- a/cc/trees/layer_tree_host_unittest_context.cc
+++ b/cc/trees/layer_tree_host_unittest_context.cc
@@ -999,11 +999,6 @@ class LayerTreeHostContextTestDontUseLostResources
   DrawResult PrepareToDrawOnThread(LayerTreeHostImpl* host_impl,
                                    LayerTreeHostImpl::FrameData* frame,
                                    DrawResult draw_result) override {
-    if (host_impl->active_tree()->source_frame_number() == 2) {
-      // Lose the context during draw on the second commit. This will cause
-      // a third commit to recover.
-      context3d_->set_times_bind_texture_succeeds(0);
-    }

[sohanjg_, 2017/05/11 14:47:21]

This was causing the context loss cb to be executed during updatehudtexture in
multi-threaded mode, as a result the gr resource cache was abandoned.
https://cs.chromium.org/chromium/src/cc/test/test_context_provider.cc?q=test_...


And in updatehudtexture, while acquiring the sk surface it returned NULL.
https://cs.chromium.org/chromium/src/third_party/skia/src/gpu/GrResourceProvi...


I have delayed the callback till the draw completes, do you think this maintains
the expectations ?

     return draw_result;
   }
 
@@ -1019,6 +1014,13 @@ class LayerTreeHostContextTestDontUseLostResources
 
   void DidCommitAndDrawFrame() override {
     ASSERT_TRUE(layer_tree_host()->hud_layer());
+
+    if (layer_tree_host()->SourceFrameNumber() == 2) {
+      // Lose the context after draw on the second commit. This will cause
+      // a third commit to recover.
+      context3d_->set_times_bind_texture_succeeds(0);
+    }
+
     // End the test once we know the 3nd frame drew.
     if (layer_tree_host()->SourceFrameNumber() < 5) {
       layer_tree_host()->root_layer()->SetNeedsDisplay();