cc: Move solid color scrollbar layer data in a seperate struct.

cc/layers/picture_layer_unittest.cc

Index: cc/layers/picture_layer_unittest.cc
diff --git a/cc/layers/picture_layer_unittest.cc b/cc/layers/picture_layer_unittest.cc
index 1a80b597406ab22d53957a835cda6fc3139b5c04..27a73d5ddfb27499bca6b58aaadc8b7cc263aeda 100644
--- a/cc/layers/picture_layer_unittest.cc
+++ b/cc/layers/picture_layer_unittest.cc
@@ -62,7 +62,7 @@ class TestSerializationPictureLayer : public PictureLayer {
   void set_is_mask(bool is_mask) { is_mask_ = is_mask; }
 
   void set_nearest_neighbor(bool nearest_neighbor) {
-    inputs_.nearest_neighbor = nearest_neighbor;
+    picture_layer_inputs_.nearest_neighbor = nearest_neighbor;
   }
 
   void ValidateSerialization(
@@ -94,7 +94,8 @@ class TestSerializationPictureLayer : public PictureLayer {
     EXPECT_TRUE(recording_source()->EqualsTo(*layer->recording_source()));
     EXPECT_EQ(update_source_frame_number_, layer->update_source_frame_number_);
     EXPECT_EQ(is_mask_, layer->is_mask_);
-    EXPECT_EQ(inputs_.nearest_neighbor, layer->inputs_.nearest_neighbor);
+    EXPECT_EQ(picture_layer_inputs_.nearest_neighbor,
+              layer->picture_layer_inputs_.nearest_neighbor);
   }
 
   std::vector<uint32_t> GetPictureIds() {