Remaining code for basic tile compression functionality.

cc/resources/resource_provider.h

Index: cc/resources/resource_provider.h
diff --git a/cc/resources/resource_provider.h b/cc/resources/resource_provider.h
index d5b57127c205db172299d6cc7048e747779e56a8..6f1b80a77b33f7a782578a10f189102e8d4d96a2 100644
--- a/cc/resources/resource_provider.h
+++ b/cc/resources/resource_provider.h
@@ -84,6 +84,7 @@ class CC_EXPORT ResourceProvider {
       BlockingTaskRunner* blocking_main_thread_task_runner,
       int highp_threshold_min,
       bool use_rgba_4444_texture_format,
+      bool use_tile_compression,

[reveman, 2015/07/21 04:26:33]

s/use_tile_compression/use_compressed_texture_formats/

ResourceProvider doesn't know what a 'tile' is..

       size_t id_allocation_chunk_size,
       bool use_persistent_map_for_gpu_memory_buffers);
   virtual ~ResourceProvider();
@@ -91,9 +92,8 @@ class CC_EXPORT ResourceProvider {
   void DidLoseOutputSurface() { lost_output_surface_ = true; }
 
   int max_texture_size() const { return max_texture_size_; }
-  ResourceFormat memory_efficient_texture_format() const {
-    return use_rgba_4444_texture_format_ ? RGBA_4444 : best_texture_format_;
-  }
+  ResourceFormat memory_efficient_texture_format(bool must_be_noncompressed,

[reveman, 2015/07/21 04:26:33]

Can we avoid must_be_noncompressed param for now and add that later if needed?

+                                                 bool must_support_alpha) const;

[reveman, 2015/07/21 04:26:33]

I think this change that adds a "bool alpha" param to this function can land
separately.

   ResourceFormat best_texture_format() const { return best_texture_format_; }
   ResourceFormat best_render_buffer_format() const {
     return best_render_buffer_format_;
@@ -444,6 +444,7 @@ class CC_EXPORT ResourceProvider {
                    BlockingTaskRunner* blocking_main_thread_task_runner,
                    int highp_threshold_min,
                    bool use_rgba_4444_texture_format,
+                   bool use_tile_compression,
                    size_t id_allocation_chunk_size,
                    bool use_persistent_map_for_gpu_memory_buffers);
   void Initialize();
@@ -594,6 +595,7 @@ class CC_EXPORT ResourceProvider {
 
   scoped_refptr<Fence> current_read_lock_fence_;
   bool use_rgba_4444_texture_format_;
+  bool use_tile_compression_;
 
   const size_t id_allocation_chunk_size_;
   scoped_ptr<IdAllocator> texture_id_allocator_;