Revert of Allow one-copy task tile worker pool to use compressed textures.

cc/raster/tile_task_worker_pool.cc

Index: cc/raster/tile_task_worker_pool.cc
diff --git a/cc/raster/tile_task_worker_pool.cc b/cc/raster/tile_task_worker_pool.cc
index 819462526f44367651037f0e03d15102c4a5b6c3..b55f69d054fe507d2295b5b1a16cf176dfaf948d 100644
--- a/cc/raster/tile_task_worker_pool.cc
+++ b/cc/raster/tile_task_worker_pool.cc
@@ -6,7 +6,6 @@
 
 #include "base/trace_event/trace_event.h"
 #include "cc/playback/display_list_raster_source.h"
-#include "cc/raster/texture_compressor.h"
 #include "skia/ext/refptr.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "third_party/skia/include/core/SkDrawFilter.h"
@@ -41,11 +40,11 @@
     case RGBA_4444:
     case RGBA_8888:
     case BGRA_8888:
-    case ETC1:
       return true;
     case ALPHA_8:
     case LUMINANCE_8:
     case RGB_565:
+    case ETC1:
     case RED_8:
       return false;
   }
@@ -82,6 +81,8 @@
   // Uses kPremul_SkAlphaType since the result is not known to be opaque.
   SkImageInfo info =
       SkImageInfo::MakeN32(size.width(), size.height(), kPremul_SkAlphaType);
+  SkColorType buffer_color_type = ResourceFormatToSkColorType(format);
+  bool needs_copy = buffer_color_type != info.colorType();
 
   // Use unknown pixel geometry to disable LCD text.
   SkSurfaceProps surface_props(0, kUnknown_SkPixelGeometry);
@@ -98,59 +99,33 @@
   if (!include_images)
     image_filter = skia::AdoptRef(new SkipImageFilter);
 
+  if (!needs_copy) {
+    skia::RefPtr<SkSurface> surface = skia::AdoptRef(
+        SkSurface::NewRasterDirect(info, memory, stride, &surface_props));
+    skia::RefPtr<SkCanvas> canvas = skia::SharePtr(surface->getCanvas());
+    canvas->setDrawFilter(image_filter.get());
+    raster_source->PlaybackToCanvas(canvas.get(), canvas_bitmap_rect,
+                                    canvas_playback_rect, scale);
+    return;
+  }
+
+  skia::RefPtr<SkSurface> surface =
+      skia::AdoptRef(SkSurface::NewRaster(info, &surface_props));
+  skia::RefPtr<SkCanvas> canvas = skia::SharePtr(surface->getCanvas());
+  canvas->setDrawFilter(image_filter.get());
+  // TODO(reveman): Improve partial raster support by reducing the size of
+  // playback rect passed to PlaybackToCanvas. crbug.com/519070
+  raster_source->PlaybackToCanvas(canvas.get(), canvas_bitmap_rect,
+                                  canvas_bitmap_rect, scale);
+
   {
     TRACE_EVENT0("cc", "TileTaskWorkerPool::PlaybackToMemory::ConvertPixels");
 
-    switch (format) {
-      case RGBA_8888:
-      case BGRA_8888: {
-        skia::RefPtr<SkSurface> surface = skia::AdoptRef(
-            SkSurface::NewRasterDirect(info, memory, stride, &surface_props));
-        skia::RefPtr<SkCanvas> canvas = skia::SharePtr(surface->getCanvas());
-        canvas->setDrawFilter(image_filter.get());
-        raster_source->PlaybackToCanvas(canvas.get(), canvas_bitmap_rect,
-                                        canvas_playback_rect, scale);
-        return;
-      }
-      case RGBA_4444:
-      case ETC1: {
-        skia::RefPtr<SkSurface> surface =
-            skia::AdoptRef(SkSurface::NewRaster(info, &surface_props));
-        skia::RefPtr<SkCanvas> canvas = skia::SharePtr(surface->getCanvas());
-        canvas->setDrawFilter(image_filter.get());
-        // TODO(reveman): Improve partial raster support by reducing the size of
-        // playback rect passed to PlaybackToCanvas. crbug.com/519070
-        raster_source->PlaybackToCanvas(canvas.get(), canvas_bitmap_rect,
-                                        canvas_bitmap_rect, scale);
-
-        if (format == ETC1) {
-          DCHECK_EQ(size.width() % 4, 0);
-          DCHECK_EQ(size.height() % 4, 0);
-          scoped_ptr<TextureCompressor> texture_compressor =
-              TextureCompressor::Create(TextureCompressor::kFormatETC1);
-          texture_compressor->Compress(
-              reinterpret_cast<const uint8_t*>(
-                  surface->peekPixels(nullptr, nullptr)),
-              reinterpret_cast<uint8_t*>(memory), size.width(), size.height(),
-              TextureCompressor::kQualityHigh);
-        } else {
-          SkImageInfo dst_info = SkImageInfo::Make(
-              info.width(), info.height(), ResourceFormatToSkColorType(format),
-              info.alphaType(), info.profileType());
-          bool rv = canvas->readPixels(dst_info, memory, stride, 0, 0);
-          DCHECK(rv);
-        }
-        return;
-      }
-      case ALPHA_8:
-      case LUMINANCE_8:
-      case RGB_565:
-      case RED_8:
-        NOTREACHED();
-        return;
-    }
-
-    NOTREACHED();
+    SkImageInfo dst_info =
+        SkImageInfo::Make(info.width(), info.height(), buffer_color_type,
+                          info.alphaType(), info.profileType());
+    bool rv = canvas->readPixels(dst_info, memory, stride, 0, 0);
+    DCHECK(rv);
   }
 }