cc: Add new RasterWorkerPool interface.

cc/resources/managed_tile_state.h

Index: cc/resources/managed_tile_state.h
diff --git a/cc/resources/managed_tile_state.h b/cc/resources/managed_tile_state.h
index 7d5eec7cdf764f4e3417fde4a763aad3c0f55ba4..e8abed9a5d8ecaabe6cc65434aca0794dbf905e3 100644
--- a/cc/resources/managed_tile_state.h
+++ b/cc/resources/managed_tile_state.h
@@ -45,9 +45,9 @@ class CC_EXPORT ManagedTileState {
 
       ResourceProvider::ResourceId get_resource_id() const {
         DCHECK(mode_ == RESOURCE_MODE);
-        DCHECK(resource_);
+        DCHECK(resource_id_);
         DCHECK(memory_state_ == USING_RELEASABLE_MEMORY || forced_upload_);
-        return resource_->id();
+        return resource_id_;

[enne (OOO), 2013/05/30 19:38:31]

Sorry for such a naive question, but I'm not sure I follow why resource_id_
needs to be stored separately from resource_? Can resource_->id() !=
resource_id_?

[reveman, 2013/05/30 23:25:18]

This is because of the current force upload mess. Force upload allows us to draw
using the resource but the ownership of the resource need to stay with the
RasterWorkerPool as it still has shared memory attached to it that can't be
released. We're planning to fix this but it will require some significant
changes to the ResourceProvider's pixel buffer API.

[enne (OOO), 2013/05/31 17:05:38]

Ok, thanks.  Can you add a FIXME here and some comment about when resource_id_
might not equal resource_? I'm sure somebody else will have the same question
when looking at this code.

[reveman, 2013/06/01 03:02:38]

Done.

       }
 
       SkColor get_solid_color() const {
@@ -90,16 +90,19 @@ class CC_EXPORT ManagedTileState {
         mode_ = SOLID_COLOR_MODE;
         solid_color_ = color;
         memory_state_ = NOT_ALLOWED_TO_USE_MEMORY;
+        resource_id_ = 0;
       }
 
       void set_rasterize_on_demand() {
         mode_ = PICTURE_PILE_MODE;
         memory_state_ = NOT_ALLOWED_TO_USE_MEMORY;
+        resource_id_ = 0;
       }
 
       Mode mode_;
       SkColor solid_color_;
 
+      ResourceProvider::ResourceId resource_id_;
       scoped_ptr<ResourcePool::Resource> resource_;
       GLenum resource_format_;
       TileVersionMemoryState memory_state_;
@@ -116,7 +119,7 @@ class CC_EXPORT ManagedTileState {
   TileVersion tile_version;
   bool picture_pile_analyzed;
   PicturePileImpl::Analysis picture_pile_analysis;
-  RasterWorkerPool::Task raster_task;
+  RasterWorkerPool::RasterTask raster_task;
 
   // Ephemeral state, valid only during TileManager::ManageTiles.
   bool is_in_never_bin_on_both_trees() const {