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cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 219ea891051ebbc651e95f2f6438fbb9f9621096..7a58dadce7b6fef79b8bb4589e423dee0bee6785 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -349,11 +349,14 @@ bool LayerTreeHostImpl::CanDraw() const {
   // client_->OnCanDrawStateChanged in the proper places and update the
   // NotifyIfCanDrawChanged test.
 
+  DLOG(INFO) << 1;
+
   if (!renderer_) {
     TRACE_EVENT_INSTANT0("cc", "LayerTreeHostImpl::CanDraw no renderer",
                          TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
+  DLOG(INFO) << 2;
 
   // Must have an OutputSurface if |renderer_| is not NULL.
   DCHECK(output_surface_);
@@ -365,33 +368,39 @@ bool LayerTreeHostImpl::CanDraw() const {
                          TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
+  DLOG(INFO) << 3;
 
   if (output_surface_->capabilities().draw_and_swap_full_viewport_every_frame)
     return true;
+  DLOG(INFO) << 4;
 
-  if (DrawViewportSize().IsEmpty()) {
+  if (false && DrawViewportSize().IsEmpty()) {
     TRACE_EVENT_INSTANT0("cc", "LayerTreeHostImpl::CanDraw empty viewport",
                          TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
+  DLOG(INFO) << 5;
   if (active_tree_->ViewportSizeInvalid()) {
     TRACE_EVENT_INSTANT0(
         "cc", "LayerTreeHostImpl::CanDraw viewport size recently changed",
         TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
+  DLOG(INFO) << 6;
   if (active_tree_->ContentsTexturesPurged()) {
     TRACE_EVENT_INSTANT0(
         "cc", "LayerTreeHostImpl::CanDraw contents textures purged",
         TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
+  DLOG(INFO) << 7;
   if (EvictedUIResourcesExist()) {
     TRACE_EVENT_INSTANT0(
         "cc", "LayerTreeHostImpl::CanDraw UI resources evicted not recreated",
         TRACE_EVENT_SCOPE_THREAD);
     return false;
   }
+  DLOG(INFO) << 8;
   return true;
 }
 
@@ -1405,6 +1414,7 @@ void LayerTreeHostImpl::DrawLayers(FrameData* frame,
     return;
   }
 
+  DLOG(INFO) << "DrawLayers";
   DCHECK(!frame->render_passes.empty());
 
   fps_counter_->SaveTimeStamp(frame_begin_time,
@@ -2102,6 +2112,7 @@ gfx::Size LayerTreeHostImpl::DrawViewportSize() const {
 }
 
 gfx::Rect LayerTreeHostImpl::DeviceViewport() const {
+  DLOG(INFO) << external_viewport_.ToString();
   if (external_viewport_.IsEmpty())
     return gfx::Rect(device_viewport_size_);