Make ShaderTranslatorCache thread safe

content/common/gpu/gpu_command_buffer_stub.cc

Index: content/common/gpu/gpu_command_buffer_stub.cc
diff --git a/content/common/gpu/gpu_command_buffer_stub.cc b/content/common/gpu/gpu_command_buffer_stub.cc
index b26757559392e78ff52656e50b5aafcf1d7b53f1..e06b2f1a680e03b3c35f5036f3d31dbd1ff886c6 100644
--- a/content/common/gpu/gpu_command_buffer_stub.cc
+++ b/content/common/gpu/gpu_command_buffer_stub.cc
@@ -492,12 +492,14 @@ void GpuCommandBufferStub::OnInitialize(
   }
 
   // Initialize the decoder with either the view or pbuffer GLContext.
-  if (!decoder_->Initialize(surface_,
-                            context,
-                            !surface_id(),
-                            initial_size_,
-                            disallowed_features_,
-                            requested_attribs_)) {
+  if (!decoder_->Initialize(
+          surface_,
+          context,
+          channel_->gpu_channel_manager()->shader_translator_cache(),
+          !surface_id(),
+          initial_size_,
+          disallowed_features_,
+          requested_attribs_)) {
     DLOG(ERROR) << "Failed to initialize decoder.";
     OnInitializeFailed(reply_message);
     return;