Move cc::DisplayItemList and related classes into cc/paint/

Also:

* The other classes in cc/playback/ have been moved into other directories
appropriate to their purpose.
* Add a component for cc/debug/ because otherwise cc/paint/ will depend on cc/
* Add a component for cc/base/ because otherwise cc/paint/ will depend on cc/
* Move cc/base/cc_export.h to cc/cc_export.h. This is the source of most of the
changes in this CL.

TBR=dcheng

BUG=665259
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2

Review-Url: https://codereview.chromium.org/2748263002
Cr-Commit-Position: refs/heads/master@{#457689}

diff --git a/cc/raster/task.h b/cc/raster/task.h
index 01c16a0..66ebc932 100644
--- a/cc/raster/task.h
+++ b/cc/raster/task.h

@@ -11,7 +11,7 @@
 #include <vector>
 
 #include "base/memory/ref_counted.h"
-#include "cc/base/cc_export.h"
+#include "cc/cc_export.h"
 
 namespace cc {
 class Task;