Disable shader disk cache by default.

content/browser/gpu/gpu_process_host.cc

 // 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.
 
 #include "content/browser/gpu/gpu_process_host.h"
 
 #include "base/base64.h"
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 738 matching lines @@
     callback.Run(IPC::ChannelHandle(), GPUInfo());
     return;
   }
 
   if (Send(new GpuMsg_EstablishChannel(client_id, share_context))) {
     channel_requests_.push(callback);
   } else {
     callback.Run(IPC::ChannelHandle(), GPUInfo());
   }
 
-  if (!CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kDisableGpuShaderDiskCache)) {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableGpuShaderDiskCache)) {
     CreateChannelCache(client_id, gpu::kDefaultMaxProgramCacheMemoryBytes);
   }
 }
 
 void GpuProcessHost::CreateViewCommandBuffer(
     const gfx::GLSurfaceHandle& compositing_surface,
     int surface_id,
     int client_id,
     const GPUCreateCommandBufferConfig& init_params,
     const CreateCommandBufferCallback& callback) {
@@ skipping 530 matching lines @@
   TRACE_EVENT0("gpu", "GpuProcessHost::OnCacheShader");
   ClientIdToShaderCacheMap::iterator iter =
       client_id_to_shader_cache_.find(client_id);
   // If the cache doesn't exist then this is an off the record profile.
   if (iter == client_id_to_shader_cache_.end())
     return;
   iter->second->Cache(GetShaderPrefixKey() + ":" + key, shader);
 }
 
 }  // namespace content