Add flag to enable rendering of text using signed distance fields.

content/renderer/render_thread_impl.h

 // Copyright (c) 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 198 matching lines @@
   }
 
   bool is_impl_side_painting_enabled() const {
     return is_impl_side_painting_enabled_;
   }
 
   bool is_low_res_tiling_enabled() const { return is_low_res_tiling_enabled_; }
 
   bool is_lcd_text_enabled() const { return is_lcd_text_enabled_; }
 
+  bool is_distance_field_text_enabled() const {
+    return is_distance_field_text_enabled_;
+  }
+
   bool is_zero_copy_enabled() const { return is_zero_copy_enabled_; }
 
   bool is_one_copy_enabled() const { return is_one_copy_enabled_; }
 
   AppCacheDispatcher* appcache_dispatcher() const {
     return appcache_dispatcher_.get();
   }
 
   DomStorageDispatcher* dom_storage_dispatcher() const {
     return dom_storage_dispatcher_.get();
@@ skipping 309 matching lines @@
   // multiple threads. Current allocation mechanism for IOSurface
   // backed GpuMemoryBuffers prevent this. crbug.com/325045
   base::ThreadChecker allocate_gpu_memory_buffer_thread_checker_;
 
   // Compositor settings
   bool is_gpu_rasterization_enabled_;
   bool is_gpu_rasterization_forced_;
   bool is_impl_side_painting_enabled_;
   bool is_low_res_tiling_enabled_;
   bool is_lcd_text_enabled_;
+  bool is_distance_field_text_enabled_;
   bool is_zero_copy_enabled_;
   bool is_one_copy_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_