content: Fix Context creation logic in ContextProviderFactoryImpl.

content/browser/renderer_host/context_provider_factory_impl_android.cc

Index: content/browser/renderer_host/context_provider_factory_impl_android.cc
diff --git a/content/browser/renderer_host/context_provider_factory_impl_android.cc b/content/browser/renderer_host/context_provider_factory_impl_android.cc
index 40cc97c1a4a271837d53117c4d92b6822012aae8..d3f14fa1eb14460154bd7ebfffc78b1fba4df0ed 100644
--- a/content/browser/renderer_host/context_provider_factory_impl_android.cc
+++ b/content/browser/renderer_host/context_provider_factory_impl_android.cc
@@ -11,7 +11,6 @@
 #include "cc/output/context_provider.h"
 #include "cc/output/vulkan_in_process_context_provider.h"
 #include "cc/surfaces/surface_manager.h"
-#include "content/browser/gpu/browser_gpu_channel_host_factory.h"
 #include "content/browser/gpu/browser_gpu_memory_buffer_manager.h"
 #include "content/browser/gpu/compositor_util.h"
 #include "content/browser/gpu/gpu_surface_tracker.h"
@@ -39,19 +38,44 @@ command_buffer_metrics::ContextType ToCommandBufferContextType(
   return command_buffer_metrics::CONTEXT_TYPE_UNKNOWN;
 }
 
+ContextProviderFactoryImpl* instance = nullptr;
+
 }  // namespace
 
 // static
+void ContextProviderFactoryImpl::Initialize(
+    gpu::GpuChannelEstablishFactory* gpu_channel_factory) {
+  DCHECK(!instance);
+  instance = new ContextProviderFactoryImpl(gpu_channel_factory);
+}
+
+void ContextProviderFactoryImpl::Terminate() {
+  DCHECK(instance);
+  delete instance;
+  instance = nullptr;
+}
+
+// static
 ContextProviderFactoryImpl* ContextProviderFactoryImpl::GetInstance() {
-  return base::Singleton<ContextProviderFactoryImpl>::get();
+  return instance;
 }
 
-ContextProviderFactoryImpl::ContextProviderFactoryImpl()
-    : in_handle_pending_requests_(false),
+ContextProviderFactoryImpl::ContextProviderFactoryImpl(
+    gpu::GpuChannelEstablishFactory* gpu_channel_factory)
+    : gpu_channel_factory_(gpu_channel_factory),
+      in_handle_pending_requests_(false),
+      in_shutdown_(false),
       surface_client_id_(0),
-      weak_factory_(this) {}
+      weak_factory_(this) {
+  DCHECK(gpu_channel_factory_);
+}
 
-ContextProviderFactoryImpl::~ContextProviderFactoryImpl() {}
+ContextProviderFactoryImpl::~ContextProviderFactoryImpl() {
+  in_shutdown_ = true;
+  if (!context_provider_requests_.empty())
+    HandlePendingRequests(nullptr,
+                          ContextCreationResult::FAILURE_FACTORY_SHUTDOWN);
+}
 
 ContextProviderFactoryImpl::ContextProvidersRequest::ContextProvidersRequest()
     : context_type(command_buffer_metrics::CONTEXT_TYPE_UNKNOWN),
@@ -145,10 +169,17 @@ void ContextProviderFactoryImpl::CreateContextProviderInternal(
   context_request.result_callback = result_callback;
 
   context_provider_requests_.push_back(context_request);
-  HandlePendingRequests();
+
+  // If the channel is available, the factory will run the callback
+  // synchronously so we'll handle this request there.
+  EstablishGpuChannel();
 }
 
-void ContextProviderFactoryImpl::HandlePendingRequests() {
+void ContextProviderFactoryImpl::HandlePendingRequests(
+    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host,
+    ContextCreationResult result) {
+  DCHECK(!in_shutdown_)
+      << "The factory is shutting down, can't handle new requests";
   DCHECK(!context_provider_requests_.empty())
       << "We don't have any pending requests?";
 
@@ -161,53 +192,52 @@ void ContextProviderFactoryImpl::HandlePendingRequests() {
     base::AutoReset<bool> auto_reset_in_handle_requests(
         &in_handle_pending_requests_, true);
 
-    scoped_refptr<gpu::GpuChannelHost> gpu_channel_host(
-        EnsureGpuChannelEstablished());
-
-    // If we don't have a Gpu Channel Host, we will come back here when the Gpu
-    // channel is established, since OnGpuChannelEstablished triggers handling
-    // of the requests we couldn't process right now.
-    if (!gpu_channel_host)
-      return;
-
     std::list<ContextProvidersRequest> context_requests =
         context_provider_requests_;
     context_provider_requests_.clear();
 
     for (ContextProvidersRequest& context_request : context_requests) {
       scoped_refptr<cc::ContextProvider> context_provider;
+      ContextCreationResult result_to_report = result;
 
       const bool create_onscreen_context =
           context_request.surface_handle != gpu::kNullSurfaceHandle;
 
       // Is the request for an onscreen context? Make sure the surface is
-      // still valid in that case. DO NOT run the callback if we don't have a
-      // valid surface.
+      // still valid in that case.
       if (create_onscreen_context &&
           !GpuSurfaceTracker::GetInstance()->IsValidSurfaceHandle(
               context_request.surface_handle)) {
-        continue;
+        // Choose what to report based on severity, factory shutdown trumps
+        // everything, otherwise report GpuSurfaceHandle loss.
+        result_to_report =
+            result_to_report == ContextCreationResult::FAILURE_FACTORY_SHUTDOWN
+                ? result_to_report
+                : ContextCreationResult::FAILURE_GPU_SURFACE_HANDLE_LOST;
+      } else if (gpu_channel_host) {
+        DCHECK_EQ(ContextCreationResult::SUCCESS, result);
+
+        context_provider = new ContextProviderCommandBuffer(
+            gpu_channel_host, gpu::GPU_STREAM_DEFAULT,
+            gpu::GpuStreamPriority::NORMAL, context_request.surface_handle,
+            GURL(std::string("chrome://gpu/ContextProviderFactoryImpl::") +
+                 std::string("CompositorContextProvider")),
+            context_request.automatic_flushes, context_request.support_locking,
+            context_request.shared_memory_limits, context_request.attributes,
+            static_cast<ContextProviderCommandBuffer*>(
+                context_request.shared_context_provider),
+            context_request.context_type);
       }
 
-      context_provider = new ContextProviderCommandBuffer(
-          gpu_channel_host, gpu::GPU_STREAM_DEFAULT,
-          gpu::GpuStreamPriority::NORMAL, context_request.surface_handle,
-          GURL(std::string("chrome://gpu/ContextProviderFactoryImpl::") +
-               std::string("CompositorContextProvider")),
-          context_request.automatic_flushes, context_request.support_locking,
-          context_request.shared_memory_limits, context_request.attributes,
-          static_cast<ContextProviderCommandBuffer*>(
-              context_request.shared_context_provider),
-          context_request.context_type);
-      context_request.result_callback.Run(context_provider);
+      context_request.result_callback.Run(context_provider, result_to_report);
     }
   }
 
   if (!context_provider_requests_.empty())
-    HandlePendingRequests();
+    EstablishGpuChannel();
 }
 
-gpu::GpuChannelHost* ContextProviderFactoryImpl::EnsureGpuChannelEstablished() {
+void ContextProviderFactoryImpl::EstablishGpuChannel() {
 #if defined(ADDRESS_SANITIZER) || defined(THREAD_SANITIZER) || \
     defined(SYZYASAN) || defined(CYGPROFILE_INSTRUMENTATION)
   const int64_t kGpuChannelTimeoutInSeconds = 40;
@@ -215,36 +245,35 @@ gpu::GpuChannelHost* ContextProviderFactoryImpl::EnsureGpuChannelEstablished() {
   const int64_t kGpuChannelTimeoutInSeconds = 10;
 #endif
 
-  BrowserGpuChannelHostFactory* factory =
-      BrowserGpuChannelHostFactory::instance();
-
-  if (factory->GetGpuChannel())
-    return factory->GetGpuChannel();
-
-  factory->EstablishGpuChannel(
-      base::Bind(&ContextProviderFactoryImpl::OnGpuChannelEstablished,
-                 weak_factory_.GetWeakPtr()));
+  // Start the timer first, if the result comes synchronously, we want it to
+  // stop in the callback.
   establish_gpu_channel_timeout_.Start(
       FROM_HERE, base::TimeDelta::FromSeconds(kGpuChannelTimeoutInSeconds),
       this, &ContextProviderFactoryImpl::OnGpuChannelTimeout);
 
-  return nullptr;
+  gpu_channel_factory_->EstablishGpuChannel(
+      base::Bind(&ContextProviderFactoryImpl::OnGpuChannelEstablished,
+                 weak_factory_.GetWeakPtr()));
 }
 
 void ContextProviderFactoryImpl::OnGpuChannelEstablished(
     scoped_refptr<gpu::GpuChannelHost> gpu_channel) {
   establish_gpu_channel_timeout_.Stop();
 
-  // This should happen only during shutdown. So early out instead of queuing
-  // more requests with the factory.
-  if (!gpu_channel)
-    return;
-
   // We can queue the Gpu Channel initialization requests multiple times as
   // we get context requests. So we might have already handled any pending
   // requests when this callback runs.
-  if (!context_provider_requests_.empty())
-    HandlePendingRequests();
+  if (context_provider_requests_.empty())
+    return;
+
+  if (gpu_channel) {
+    HandlePendingRequests(std::move(gpu_channel),
+                          ContextCreationResult::SUCCESS);
+  } else {
+    HandlePendingRequests(
+        nullptr,
+        ContextCreationResult::FAILURE_GPU_PROCESS_INITIALIZATION_FAILED);
+  }
 }
 
 void ContextProviderFactoryImpl::OnGpuChannelTimeout() {