Implement on demand quad rasterization for PicturePiles.

cc/resources/tile_manager.cc

Index: cc/resources/tile_manager.cc
diff --git a/cc/resources/tile_manager.cc b/cc/resources/tile_manager.cc
index 6fa8f910d95310a37d63dd18f25d73295894b961..4356f13d1fa3adadc12bf45c4a169cafbec5dfcd 100644
--- a/cc/resources/tile_manager.cc
+++ b/cc/resources/tile_manager.cc
@@ -591,8 +591,12 @@ void TileManager::AssignGpuMemoryToTiles() {
           mts.bin[LOW_PRIORITY_BIN] == NOW_BIN)
           bytes_that_exceeded_memory_budget_in_now_bin += tile_bytes;
       FreeResourcesForTile(tile);
+      tile->drawing_info().set_rasterize_on_demand();
+      tile->drawing_info().set_contents_swizzled(
+        !PlatformColor::SameComponentOrder(tile->format_));
       continue;
     }
+    tile->drawing_info().set_texture();

[reveman, 2013/03/23 00:41:31]

This feels a bit awkward. I think something like set_no_rasterize_on_demand()
would be better.

[Leandro Graciá Gil, 2013/03/25 15:21:02]

Since there is another comment for this same method suggesting to use
set_resource, I'm proposing "set_use_resource" to make clear both cases. Let me
know what you think.

     bytes_left -= tile_bytes;
     mts.can_use_gpu_memory = true;
     if (!mts.drawing_info.resource_ &&