Use GpuPreferences to avoid directly accessing switches in gpu related code

content/common/gpu/gpu_channel_manager.cc

Index: content/common/gpu/gpu_channel_manager.cc
diff --git a/content/common/gpu/gpu_channel_manager.cc b/content/common/gpu/gpu_channel_manager.cc
index d5ffd601afedeadd12b1b645ce6f368e19f08916..74b108e5f0e810eefcbcf4d66f4742cf07b90c79 100644
--- a/content/common/gpu/gpu_channel_manager.cc
+++ b/content/common/gpu/gpu_channel_manager.cc
@@ -52,6 +52,7 @@ const int kMaxKeepAliveTimeMs = 200;
 }
 
 GpuChannelManager::GpuChannelManager(
+    const gpu::GpuPreferences& gpu_preferences,
     GpuChannelManagerDelegate* delegate,
     GpuWatchdog* watchdog,
     base::SingleThreadTaskRunner* task_runner,
@@ -61,11 +62,12 @@ GpuChannelManager::GpuChannelManager(
     GpuMemoryBufferFactory* gpu_memory_buffer_factory)
     : task_runner_(task_runner),
       io_task_runner_(io_task_runner),
+      gpu_preferences_(gpu_preferences),
       delegate_(delegate),
       watchdog_(watchdog),
       shutdown_event_(shutdown_event),
       share_group_(new gfx::GLShareGroup),
-      mailbox_manager_(gpu::gles2::MailboxManager::Create()),
+      mailbox_manager_(gpu::gles2::MailboxManager::Create(gpu_preferences)),
       gpu_memory_manager_(this),
       sync_point_manager_(sync_point_manager),
       sync_point_client_waiter_(
@@ -95,15 +97,19 @@ gpu::gles2::ProgramCache* GpuChannelManager::program_cache() {
        gfx::g_driver_gl.ext.b_GL_OES_get_program_binary) &&
       !base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableGpuProgramCache)) {
-    program_cache_.reset(new gpu::gles2::MemoryProgramCache());
+    program_cache_.reset(new gpu::gles2::MemoryProgramCache(
+          gpu_preferences_.gpu_program_cache_size,
+          gpu_preferences_.disable_gpu_shader_disk_cache));
   }
   return program_cache_.get();
 }
 
 gpu::gles2::ShaderTranslatorCache*
 GpuChannelManager::shader_translator_cache() {
-  if (!shader_translator_cache_.get())
-    shader_translator_cache_ = new gpu::gles2::ShaderTranslatorCache;
+  if (!shader_translator_cache_.get()) {
+    shader_translator_cache_ =
+        new gpu::gles2::ShaderTranslatorCache(gpu_preferences_);
+  }
   return shader_translator_cache_.get();
 }