SetNeedsRedraw directly when updating a visible tile.

cc/test/fake_picture_pile_impl.cc

Index: cc/test/fake_picture_pile_impl.cc
diff --git a/cc/test/fake_picture_pile_impl.cc b/cc/test/fake_picture_pile_impl.cc
index e688d22020b985488a69b913dfaca0a1e9811e51..f0c0d2b0fde8fa10b9d2c9183c5d7ce2b6f6eb99 100644
--- a/cc/test/fake_picture_pile_impl.cc
+++ b/cc/test/fake_picture_pile_impl.cc
@@ -10,14 +10,18 @@
 
 #include "cc/resources/picture_pile.h"
 #include "cc/test/impl_side_painting_settings.h"
+#include "cc/test/thread_blocker.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace cc {
 
-FakePicturePileImpl::FakePicturePileImpl() {}
+FakePicturePileImpl::FakePicturePileImpl() : raster_thread_blocker_(nullptr) {
+}
 
-FakePicturePileImpl::FakePicturePileImpl(const PicturePileBase* other)
+FakePicturePileImpl::FakePicturePileImpl(const PicturePileBase* other,
+                                         ThreadBlocker* blocker)
     : PicturePileImpl(other),
+      raster_thread_blocker_(blocker),
       tile_grid_info_(other->GetTileGridInfoForTesting()) {
 }
 
@@ -33,7 +37,7 @@ scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateFilledPile(
   pile.SetRecordedViewportForTesting(gfx::Rect(layer_bounds));
   pile.SetHasAnyRecordingsForTesting(true);
 
-  auto pile_impl = make_scoped_refptr(new FakePicturePileImpl(&pile));
+  auto pile_impl = make_scoped_refptr(new FakePicturePileImpl(&pile, nullptr));
   for (int x = 0; x < pile_impl->tiling().num_tiles_x(); ++x) {
     for (int y = 0; y < pile_impl->tiling().num_tiles_y(); ++y)
       pile_impl->AddRecordingAt(x, y);
@@ -50,7 +54,7 @@ scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateEmptyPile(
   pile.SetTileGridSize(ImplSidePaintingSettings().default_tile_grid_size);
   pile.SetRecordedViewportForTesting(gfx::Rect());
   pile.SetHasAnyRecordingsForTesting(false);
-  return make_scoped_refptr(new FakePicturePileImpl(&pile));
+  return make_scoped_refptr(new FakePicturePileImpl(&pile, nullptr));
 }
 
 scoped_refptr<FakePicturePileImpl>
@@ -64,7 +68,7 @@ FakePicturePileImpl::CreateEmptyPileThatThinksItHasRecordings(
   // This simulates a false positive for this flag.
   pile.SetRecordedViewportForTesting(gfx::Rect());
   pile.SetHasAnyRecordingsForTesting(true);
-  return make_scoped_refptr(new FakePicturePileImpl(&pile));
+  return make_scoped_refptr(new FakePicturePileImpl(&pile, nullptr));
 }
 
 scoped_refptr<FakePicturePileImpl>
@@ -78,11 +82,25 @@ FakePicturePileImpl::CreateInfiniteFilledPile() {
   pile.SetRecordedViewportForTesting(gfx::Rect(size));
   pile.SetHasAnyRecordingsForTesting(true);
 
-  auto pile_impl = make_scoped_refptr(new FakePicturePileImpl(&pile));
+  auto pile_impl = make_scoped_refptr(new FakePicturePileImpl(&pile, nullptr));
   pile_impl->AddRecordingAt(0, 0);
   return pile_impl;
 }
 
+scoped_refptr<FakePicturePileImpl> FakePicturePileImpl::CreateFromPile(
+    const PicturePileBase* other,
+    ThreadBlocker* blocker) {
+  return make_scoped_refptr(new FakePicturePileImpl(other, blocker));
+}
+
+void FakePicturePileImpl::PlaybackToCanvas(SkCanvas* canvas,
+                                           const gfx::Rect& canvas_rect,
+                                           float contents_scale) const {
+  PicturePileImpl::PlaybackToCanvas(canvas, canvas_rect, contents_scale);
+  if (raster_thread_blocker_)
+    raster_thread_blocker_->Wait();
+}
+
 void FakePicturePileImpl::AddRecordingAt(int x, int y) {
   EXPECT_GE(x, 0);
   EXPECT_GE(y, 0);