Make ShaderTranslatorCache thread safe

android_webview/browser/hardware_renderer.cc

 // 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.
 
 #include "android_webview/browser/hardware_renderer.h"
 
 #include "android_webview/browser/aw_gl_surface.h"
 #include "android_webview/browser/browser_view_renderer_client.h"
 #include "android_webview/browser/gl_view_renderer_manager.h"
 #include "android_webview/browser/scoped_app_gl_state_restore.h"
 #include "android_webview/public/browser/draw_gl.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
 #include "base/strings/string_number_conversions.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/common/content_switches.h"
+#include "gpu/command_buffer/service/shader_translator_cache.h"
 #include "ui/gfx/transform.h"
 
 using content::BrowserThread;
 
 namespace android_webview {
 
 namespace {
 
 // Used to calculate memory and resource allocation. Determined experimentally.
 const size_t g_memory_multiplier = 10;
@@ skipping 218 matching lines @@
   }
 }
 
 void DeferredGpuCommandService::ScheduleIdleWork(
     const base::Closure& callback) {
   // TODO(sievers): Should this do anything?
 }
 
 bool DeferredGpuCommandService::UseVirtualizedGLContexts() { return true; }
 
+scoped_refptr<gpu::gles2::ShaderTranslatorCache>
+DeferredGpuCommandService::shader_translator_cache() {
+  if (!shader_translator_cache_.get())
+    shader_translator_cache_ = new gpu::gles2::ShaderTranslatorCache;
+  return shader_translator_cache_;
+}
+
 void DeferredGpuCommandService::RunTasks() {
   bool has_more_tasks;
   {
     base::AutoLock lock(tasks_lock_);
     has_more_tasks = tasks_.size() > 0;
   }
 
   while (has_more_tasks) {
     base::Closure task;
     {
@@ skipping 13 matching lines @@
   base::RefCountedThreadSafe<DeferredGpuCommandService>::AddRef();
 }
 
 void DeferredGpuCommandService::Release() const {
   base::RefCountedThreadSafe<DeferredGpuCommandService>::Release();
 }
 
 }  // namespace internal
 
 }  // namespace android_webview