Move AW renderer compositor context to gpu thread

gpu/command_buffer/service/mailbox_manager_sync.cc

Index: gpu/command_buffer/service/mailbox_manager_sync.cc
diff --git a/gpu/command_buffer/service/mailbox_manager_sync.cc b/gpu/command_buffer/service/mailbox_manager_sync.cc
index 65376afdf87e9843485787e21fdd16acbc970b67..5a8e0d9f1a119c9178456b9f2d5bfee83ac28676 100644
--- a/gpu/command_buffer/service/mailbox_manager_sync.cc
+++ b/gpu/command_buffer/service/mailbox_manager_sync.cc
@@ -7,8 +7,11 @@
 #include <algorithm>
 #include <queue>
 
+#include "base/command_line.h"
+#include "base/lazy_instance.h"
 #include "base/memory/linked_ptr.h"
 #include "base/synchronization/lock.h"
+#include "gpu/command_buffer/service/gpu_switches.h"
 #include "gpu/command_buffer/service/texture_manager.h"
 #include "ui/gl/gl_fence.h"
 #include "ui/gl/gl_implementation.h"
@@ -22,6 +25,18 @@ namespace gles2 {
 
 namespace {
 
+struct SkipManagedPool {
+  SkipManagedPool() {
+    skip = !base::CommandLine::ForCurrentProcess()->HasSwitch(
+        switches::kEnableAsyncPixelWithThreadedTextureMailboxes);
+  }
+
+  bool skip;
+};
+
+base::LazyInstance<SkipManagedPool> g_skip_managed_pool =
+    LAZY_INSTANCE_INITIALIZER;
+
 bool SkipTextureWorkarounds(const Texture* texture) {
   // TODO(sievers): crbug.com/352274
   // Should probably only fail if it already *has* mipmaps, while allowing
@@ -33,8 +48,10 @@ bool SkipTextureWorkarounds(const Texture* texture) {
 
   // Skip compositor resources/tile textures.
   // TODO: Remove this, see crbug.com/399226.
-  if (texture->pool() == GL_TEXTURE_POOL_MANAGED_CHROMIUM)
+  if (g_skip_managed_pool.Get().skip &&
+      texture->pool() == GL_TEXTURE_POOL_MANAGED_CHROMIUM) {

[no sievers, 2015/01/15 20:26:05]

Can we just remove the workaround entirely?
We shouldn't hit the problem if we always disable the EGL image uploader when
MailboxManagerSync is in use.

     return true;
+  }
 
   return false;
 }