cc: Remove legacy accelerated painting path

cc/output/delegating_renderer.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/output/delegating_renderer.h"
 
 #include <set>
 #include <string>
 #include <vector>
 
@@ skipping 62 matching lines @@
   context3d->pushGroupMarkerEXT("CompositorContext");
 
   std::string extensions_string =
       UTF16ToASCII(context3d->getString(GL_EXTENSIONS));
 
   std::vector<std::string> extensions;
   base::SplitString(extensions_string, ' ', &extensions);
 
   // TODO(danakj): We need non-GPU-specific paths for these things. This
   // renderer shouldn't need to use context3d extensions directly.
-  bool has_read_bgra = false;
   bool has_set_visibility = false;
   bool has_io_surface = false;
   bool has_arb_texture_rect = false;
   bool has_egl_image = false;
   bool has_map_image = false;
   for (size_t i = 0; i < extensions.size(); ++i) {
-    if (extensions[i] == "GL_EXT_read_format_bgra") {
-      has_read_bgra = true;
-    } else if (extensions[i] == "GL_CHROMIUM_set_visibility") {
+    if (extensions[i] == "GL_CHROMIUM_set_visibility") {
       has_set_visibility = true;
     } else if (extensions[i] == "GL_CHROMIUM_iosurface") {
       has_io_surface = true;
     } else if (extensions[i] == "GL_ARB_texture_rectangle") {
         has_arb_texture_rect = true;
     } else if (extensions[i] == "GL_OES_EGL_image_external") {
         has_egl_image = true;
     } else if (extensions[i] == "GL_CHROMIUM_map_image") {
       has_map_image = true;
     }
   }
 
   if (has_io_surface)
     DCHECK(has_arb_texture_rect);
 
-  capabilities_.using_accelerated_painting =
-      Settings().accelerate_painting &&
-      capabilities_.best_texture_format == GL_BGRA_EXT &&
-      has_read_bgra;
-
   // TODO(piman): loop visibility to GPU process?
   capabilities_.using_set_visibility = has_set_visibility;
 
   // TODO(danakj): Support GpuMemoryManager.
   capabilities_.using_gpu_memory_manager = false;
 
   capabilities_.using_egl_image = has_egl_image;
 
   capabilities_.using_map_image = has_map_image;
 
@@ skipping 63 matching lines @@
   if (!context3d)
     return false;
   return context3d->getGraphicsResetStatusARB() != GL_NO_ERROR;
 }
 
 void DelegatingRenderer::SetVisible(bool visible) {
   visible_ = visible;
 }
 
 }  // namespace cc