cc: Adding support for RGBA_4444 tile textures

cc/resources/image_raster_worker_pool.cc

Index: cc/resources/image_raster_worker_pool.cc
diff --git a/cc/resources/image_raster_worker_pool.cc b/cc/resources/image_raster_worker_pool.cc
index 9862484ccf0aa4945cd94886650505bf47152173..2dfc0907a672a0fb63d582d5a0f0baf411dd4141 100644
--- a/cc/resources/image_raster_worker_pool.cc
+++ b/cc/resources/image_raster_worker_pool.cc
@@ -34,14 +34,10 @@ class ImageWorkerPoolTaskImpl : public internal::WorkerPoolTask {
     if (!buffer_)
       return;
 
-    SkBitmap bitmap;
-    bitmap.setConfig(SkBitmap::kARGB_8888_Config,
-                     task_->resource()->size().width(),
-                     task_->resource()->size().height(),
-                     stride_);
-    bitmap.setPixels(buffer_);
-    SkBitmapDevice device(bitmap);
-    task_->RunOnWorkerThread(&device, thread_index);
+    task_->RunOnWorkerThread(thread_index,
+                             buffer_,
+                             task_->resource()->size(),
+                             stride_);
   }
   virtual void CompleteOnOriginThread() OVERRIDE {
     reply_.Run(!HasFinishedRunning());
@@ -156,8 +152,9 @@ void ImageRasterWorkerPool::ScheduleTasks(RasterTask::Queue* queue) {
       "state", TracedValue::FromValue(StateAsValue().release()));
 }
 
-GLenum ImageRasterWorkerPool::GetResourceFormat() const {
-  return GL_RGBA;  // Only format supported by CHROMIUM_map_image
+ResourceFormat ImageRasterWorkerPool::GetResourceFormat() const {
+  // Only format supported by CHROMIUM_map_image
+  return RGBA_8888;
 }
 
 void ImageRasterWorkerPool::OnRasterTasksFinished() {