Add flag for drawing layers to screen with Ganesh

cc/resources/picture_pile_impl_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/test/fake_picture_pile_impl.h"
 #include "cc/test/skia_common.h"
 #include "skia/ext/lazy_pixel_ref.h"
 #include "skia/ext/refptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 113 matching lines @@
   pile->AnalyzeInRect(gfx::Rect(0, 35, 10, 10), 0.1f, &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, solid_color);
 
   analysis.is_solid_color = false;
   pile->AnalyzeInRect(gfx::Rect(35, 35, 10, 10), 0.1f, &analysis);
   EXPECT_TRUE(analysis.is_solid_color);
   EXPECT_EQ(analysis.solid_color, solid_color);
 }
 
+TEST(PicturePileImplTest, AnalyzeIsSolidEmpty) {
+  gfx::Size tile_size(100, 100);
+  gfx::Size layer_bounds(400, 400);
+
+  scoped_refptr<FakePicturePileImpl> pile =
+      FakePicturePileImpl::CreateFilledPile(tile_size, layer_bounds);
+  PicturePileImpl::Analysis analysis;
+  EXPECT_FALSE(analysis.is_solid_color);
+
+  pile->AnalyzeInRect(gfx::Rect(0, 0, 400, 400), 1.f, &analysis);
+
+  EXPECT_TRUE(analysis.is_solid_color);
+  EXPECT_EQ(analysis.solid_color, SkColorSetARGB(0, 0, 0, 0));
+}
+
 TEST(PicturePileImplTest, PixelRefIteratorEmpty) {
   gfx::Size tile_size(128, 128);
   gfx::Size layer_bounds(256, 256);
 
   // Create a filled pile with no recording.
   scoped_refptr<FakePicturePileImpl> pile =
       FakePicturePileImpl::CreateFilledPile(tile_size, layer_bounds);
 
   // Tile sized iterators.
   {
@@ skipping 654 matching lines @@
     PicturePileImpl::PixelRefIterator iterator(
         gfx::Rect(0, 128, 128, 128),
         1.0,
         pile);
     EXPECT_FALSE(iterator);
   }
 }
 
 }  // namespace
 }  // namespace cc