Remaining code for basic tile compression functionality.

cc/raster/pixel_buffer_tile_task_worker_pool.cc

Index: cc/raster/pixel_buffer_tile_task_worker_pool.cc
diff --git a/cc/raster/pixel_buffer_tile_task_worker_pool.cc b/cc/raster/pixel_buffer_tile_task_worker_pool.cc
index df79519485d8d3ee1b1301e24b699c235467c81b..de2c0ddf8e2398e5f751b2d61de6bd43abaa1e85 100644
--- a/cc/raster/pixel_buffer_tile_task_worker_pool.cc
+++ b/cc/raster/pixel_buffer_tile_task_worker_pool.cc
@@ -313,12 +313,18 @@ void PixelBufferTileTaskWorkerPool::CheckForCompletedTasks() {
   completed_raster_tasks_.clear();
 }
 
-ResourceFormat PixelBufferTileTaskWorkerPool::GetResourceFormat() const {
-  return resource_provider_->memory_efficient_texture_format();
+ResourceFormat PixelBufferTileTaskWorkerPool::GetResourceFormat(
+    bool must_be_noncompressed,
+    bool must_support_alpha) const {
+  return resource_provider_->memory_efficient_texture_format(
+      must_be_noncompressed, must_support_alpha);
 }
 
-bool PixelBufferTileTaskWorkerPool::GetResourceRequiresSwizzle() const {
-  return !PlatformColor::SameComponentOrder(GetResourceFormat());
+bool PixelBufferTileTaskWorkerPool::GetResourceRequiresSwizzle(
+    bool must_be_noncompressed,
+    bool must_support_alpha) const {
+  return !PlatformColor::SameComponentOrder(
+             GetResourceFormat(must_be_noncompressed, must_support_alpha));
 }
 
 scoped_ptr<RasterBuffer> PixelBufferTileTaskWorkerPool::AcquireBufferForRaster(