cc/paint: Remove PaintCanvas::peekPixels.

ui/gfx/color_utils_unittest.cc

Index: ui/gfx/color_utils_unittest.cc
diff --git a/ui/gfx/color_utils_unittest.cc b/ui/gfx/color_utils_unittest.cc
index 3870dd3f38e3c06fef309f8f69b51cc48434c9f1..fcba64c05f9fb4ee7d861e0518604e9762e16317 100644
--- a/ui/gfx/color_utils_unittest.cc
+++ b/ui/gfx/color_utils_unittest.cc
@@ -128,7 +128,7 @@ TEST(ColorUtils, CalculateBoringScore_SingleColor) {
   // Fill all pixels in black.
   canvas.FillRect(gfx::Rect(kSize), SK_ColorBLACK);
 
-  SkBitmap bitmap = canvas.ToBitmap();
+  SkBitmap bitmap = canvas.GetBitmap();
   // The thumbnail should deserve the highest boring score.
   EXPECT_DOUBLE_EQ(1.0, CalculateBoringScore(bitmap));
 }
@@ -143,7 +143,7 @@ TEST(ColorUtils, CalculateBoringScore_TwoColors) {
   canvas.FillRect(gfx::Rect(0, 0, kSize.width() / 2, kSize.height()),
                   SK_ColorWHITE);
 
-  SkBitmap bitmap = canvas.ToBitmap();
+  SkBitmap bitmap = canvas.GetBitmap();
   ASSERT_EQ(kSize.width(), bitmap.width());
   ASSERT_EQ(kSize.height(), bitmap.height());
   // The thumbnail should be less boring because two colors are used.