Initialize GPU shader disk cache on brower thread.

content/browser/gpu/browser_gpu_channel_host_factory.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/browser_gpu_channel_host_factory.h"
 
 #include "base/bind.h"
+#include "base/command_line.h"
 #include "base/location.h"
 #include "base/profiler/scoped_tracker.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/trace_event/memory_dump_manager.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/gpu/gpu_data_manager_impl.h"
 #include "content/browser/gpu/gpu_process_host.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
+#include "content/browser/gpu/shader_disk_cache.h"
 #include "content/common/child_process_host_impl.h"
 #include "content/common/gpu/gpu_messages.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/gpu_data_manager.h"
 #include "content/public/common/content_client.h"
+#include "gpu/command_buffer/service/gpu_switches.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/message_filter.h"
 
 namespace content {
 
 BrowserGpuChannelHostFactory* BrowserGpuChannelHostFactory::instance_ = NULL;
 
 struct BrowserGpuChannelHostFactory::CreateRequest {
   CreateRequest(int32 route_id)
       : event(true, false),
@@ skipping 196 matching lines @@
   instance_ = NULL;
 }
 
 BrowserGpuChannelHostFactory::BrowserGpuChannelHostFactory()
     : gpu_client_id_(ChildProcessHostImpl::GenerateChildProcessUniqueId()),
       gpu_client_tracing_id_(ChildProcessHost::kBrowserTracingProcessId),
       shutdown_event_(new base::WaitableEvent(true, false)),
       gpu_memory_buffer_manager_(
           new BrowserGpuMemoryBufferManager(gpu_client_id_,
                                             gpu_client_tracing_id_)),
-      gpu_host_id_(0) {}
+      gpu_host_id_(0) {
+  GetIOThreadTaskRunner()->PostTask(
+      FROM_HERE,
+      base::Bind(&BrowserGpuChannelHostFactory::InitializeShaderDiskCacheOnIO,
+                 base::Unretained(this)));

[piman, 2015/08/07 19:33:59]

Unretained seems unsafe.

How about testing the command line and grabbing the directory here, and posting
the task only if we need to, passing the directory and the client id by value?
Then the function to set the cache info doesn't need |this| and can be static.

[Jamie Madill, 2015/08/07 20:07:58]

Done.

+}
 
 BrowserGpuChannelHostFactory::~BrowserGpuChannelHostFactory() {
   DCHECK(IsMainThread());
   if (pending_request_.get())
     pending_request_->Cancel();
   for (size_t n = 0; n < established_callbacks_.size(); n++)
     established_callbacks_[n].Run();
   shutdown_event_->Signal();
   if (gpu_channel_) {
     gpu_channel_->DestroyChannel();
     gpu_channel_ = NULL;
   }
 }
 
+void BrowserGpuChannelHostFactory::InitializeShaderDiskCacheOnIO() {
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableGpuShaderDiskCache)) {
+    base::FilePath cache_dir =
+        GetContentClient()->browser()->GetShaderDiskCacheDirectory();
+    if (!cache_dir.empty()) {
+      ShaderCacheFactory::GetInstance()->SetCacheInfo(gpu_client_id_,
+                                                      cache_dir);
+    } else {
+      LOG(ERROR) << "Failed to init browser shader disk cache.";
+    }
+  }
+}
+
 bool BrowserGpuChannelHostFactory::IsMainThread() {
   return BrowserThread::CurrentlyOn(BrowserThread::UI);
 }
 
 scoped_refptr<base::SingleThreadTaskRunner>
 BrowserGpuChannelHostFactory::GetIOThreadTaskRunner() {
   return BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO);
 }
 
 scoped_ptr<base::SharedMemory>
@@ skipping 147 matching lines @@
     int host_id,
     scoped_refptr<IPC::MessageFilter> filter) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   GpuProcessHost* host = GpuProcessHost::FromID(host_id);
   if (host)
     host->AddFilter(filter.get());
 }
 
 }  // namespace content