Disable unified media pipeline (Spitzer) for Webview for PowerVR

content/browser/gpu/gpu_data_manager_impl_private.cc

 // Copyright (c) 2013 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 "content/browser/gpu/gpu_data_manager_impl_private.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 30 matching lines @@
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_switches.h"
 #include "ui/gl/gpu_switching_manager.h"
 
 #if defined(OS_MACOSX)
 #include <ApplicationServices/ApplicationServices.h>
 #endif  // OS_MACOSX
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif  // OS_WIN
+#if defined(OS_ANDROID)
+#include "media/base/media_switches.h"
+#endif
 
 namespace content {
 
 namespace {
 
 enum GpuFeatureStatus {
     kGpuFeatureEnabled = 0,
     kGpuFeatureBlacklisted = 1,
     kGpuFeatureDisabled = 2,  // disabled by user but not blacklisted
     kGpuFeatureNumStatus
@@ skipping 676 matching lines @@
   }
 
   if (ShouldDisableAcceleratedVideoDecode(command_line)) {
     if (gpu_preferences) {
       gpu_preferences->disable_accelerated_video_decode = true;
     } else {
       command_line->AppendSwitch(switches::kDisableAcceleratedVideoDecode);
     }
   }
 
+#if defined(OS_ANDROID)
+  if (command_line->HasSwitch(switches::kEnableThreadedTextureMailboxes) &&

[Ken Russell (switch to Gerrit), 2016/08/26 00:22:15]

Question: is this the key flag which distinguishes WebView from Chromium?

+      IsDriverBugWorkaroundActive(gpu::AVDA_NO_EGLIMAGE_FOR_LUMINANCE_TEX)) {
+    command_line->AppendSwitch(switches::kDisableUnifiedMediaPipeline);
+  }
+#endif
+
 #if defined(OS_WIN)
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_VPX_DECODE) &&
       gpu_preferences) {
     gpu_preferences->enable_accelerated_vpx_decode =
         gpu::GpuPreferences::VPX_VENDOR_NONE;
   }
 #endif
 
 #if defined(ENABLE_WEBRTC)
   if (IsFeatureBlacklisted(gpu::GPU_FEATURE_TYPE_ACCELERATED_VIDEO_ENCODE) &&
@@ skipping 546 matching lines @@
   gpu_info_.context_info_state = gpu::kCollectInfoFatalFailure;
 #if defined(OS_WIN)
   gpu_info_.dx_diagnostics_info_state = gpu::kCollectInfoFatalFailure;
 #endif
   complete_gpu_info_already_requested_ = true;
   // Some observers might be waiting.
   NotifyGpuInfoUpdate();
 }
 
 }  // namespace content