cc: Refactor how picture layers are exposed to the tile manager.

cc/test/fake_tile_manager_client.cc

Index: cc/test/fake_tile_manager_client.cc
diff --git a/cc/test/fake_tile_manager_client.cc b/cc/test/fake_tile_manager_client.cc
index c82aeb00cbe572e675cff590aa70650e6034d7ef..adbae1c5da60b4bbbc3d05a5b8fd98cb701e394f 100644
--- a/cc/test/fake_tile_manager_client.cc
+++ b/cc/test/fake_tile_manager_client.cc
@@ -4,6 +4,19 @@
 
 #include "cc/test/fake_tile_manager_client.h"
 
+#include <vector>
+
 namespace cc {
 
+FakeTileManagerClient::FakeTileManagerClient() {
+}
+
+FakeTileManagerClient::~FakeTileManagerClient() {
+}
+
+const std::vector<PictureLayerImpl*>&
+FakeTileManagerClient::GetPictureLayers() {
+  return picture_layers_;
+}
+
 }  // namespace cc