Cleanup: Remove unneeded media/ SSE2 checks and unused code. (try 2)

media/base/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/android/config.gni")
 import("//build/config/arm.gni")
 import("//build/config/ui.gni")
 import("//build/config/linux/pkg_config.gni")
 import("//media/media_options.gni")
 
@@ skipping 191 matching lines @@
   } else if (is_win) {
     sources += [ "user_input_monitor_win.cc" ]
   } else {
     defines += [ "DISABLE_USER_INPUT_MONITOR" ]
   }
 
   if (cpu_arch == "x86" || cpu_arch == "x64") {
     sources += [ "simd/convert_yuv_to_rgb_x86.cc" ]
     deps += [
       ":media_yasm",
-      ":media_mmx",
       ":media_sse2",
     ]
   }
 
   if (is_linux || is_win) {
     sources += [
       "keyboard_event_counter.cc",
       "keyboard_event_counter.h",
     ]
   }
@@ skipping 121 matching lines @@
       "demuxer_perftest.cc",
     ]
   }
 
   if (is_android) {
     deps += [ "//ui/gl"]
   }
 }
 
 if (cpu_arch == "x86" || cpu_arch == "x64") {
-  source_set("media_mmx") {
-    sources = [ "simd/filter_yuv_mmx.cc" ]
-    configs += [ "//media:media_config" ]
-    if (!is_win) {
-      cflags = [ "-mmmx" ]
-    }
-  }
-
   source_set("media_sse2") {
     sources = [
       "simd/convert_rgb_to_yuv_sse2.cc",
       "simd/convert_rgb_to_yuv_ssse3.cc",
       "simd/filter_yuv_sse2.cc",
     ]
     configs += [ "//media:media_config" ]
     if (!is_win) {
       cflags = [ "-msse2" ]
     }
   }
 
   import("//third_party/yasm/yasm_assemble.gni")
   yasm_assemble("media_yasm") {
     sources = [
       "simd/convert_rgb_to_yuv_ssse3.asm",
-      "simd/convert_yuv_to_rgb_mmx.asm",
       "simd/convert_yuv_to_rgb_sse.asm",
       "simd/convert_yuva_to_argb_mmx.asm",
       "simd/empty_register_state_mmx.asm",
       "simd/linear_scale_yuv_to_rgb_mmx.asm",
       "simd/linear_scale_yuv_to_rgb_sse.asm",
       "simd/scale_yuv_to_rgb_mmx.asm",
       "simd/scale_yuv_to_rgb_sse.asm",
     ]
 
     # TODO(ajwong): Only export if shared_library build...
@@ skipping 34 matching lines @@
       if (is_posix) {
         yasm_flags += [ "-DELF" ]
         if (cpu_arch == "x64") {
         # TODO(ajwong): Why isn't this true in mac?
           yasm_flags += [ "-DPIC" ]
         }
       }
     }
   }
 }