{Browser}GpuMemoryBufferManager: add supported native attrib queries

content/browser/gpu/browser_gpu_memory_buffer_manager.cc

Index: content/browser/gpu/browser_gpu_memory_buffer_manager.cc
diff --git a/content/browser/gpu/browser_gpu_memory_buffer_manager.cc b/content/browser/gpu/browser_gpu_memory_buffer_manager.cc
index 3cb728df94b7a628b0e390ad7b480b5abee799f2..2273468169ec140529559f06a1b29263ba408335 100644
--- a/content/browser/gpu/browser_gpu_memory_buffer_manager.cc
+++ b/content/browser/gpu/browser_gpu_memory_buffer_manager.cc
@@ -65,6 +65,17 @@ struct BrowserGpuMemoryBufferManager::CreateGpuMemoryBufferRequest {
   std::unique_ptr<gfx::GpuMemoryBuffer> result;
 };
 
+struct BrowserGpuMemoryBufferManager::GetGpuMemoryBufferAttribsRequest {
+  GetGpuMemoryBufferAttribsRequest(int client_id)
+      : event(base::WaitableEvent::ResetPolicy::MANUAL,
+              base::WaitableEvent::InitialState::NOT_SIGNALED),
+        client_id(client_id){};
+  ~GetGpuMemoryBufferAttribsRequest(){};
+  base::WaitableEvent event;
+  int client_id;
+  gfx::GpuMemoryBufferAttribVector result;
+};
+
 BrowserGpuMemoryBufferManager::BrowserGpuMemoryBufferManager(
     int gpu_client_id,
     uint64_t gpu_client_tracing_id)
@@ -140,6 +151,59 @@ void BrowserGpuMemoryBufferManager::SetDestructionSyncToken(
       sync_token);
 }
 
+void BrowserGpuMemoryBufferManager::HandleGpuMemoryBufferAttribsReceivedOnIO(
+    GetGpuMemoryBufferAttribsRequest* request,
+    const gfx::GpuMemoryBufferAttribVector& supported_attribs) {
+  request->result = supported_attribs;
+  request->event.Signal();
+}
+
+void HostGetGpuMemoryBufferAttribs(
+    GpuProcessHost* host,
+    int client_id,
+    const BrowserGpuMemoryBufferManager::GetGpuMemoryBufferAttribsCallback&
+        callback) {
+  host->GetGpuMemoryBufferAttribs(callback);
+}
+
+void BrowserGpuMemoryBufferManager::HandleGetGpuMemoryBufferAttribsOnIO(
+    GetGpuMemoryBufferAttribsRequest* request) {
+  GetGpuMemoryBufferAttribsOnIO(
+      base::Bind(&HostGetGpuMemoryBufferAttribs), request->client_id,
+      base::Bind(&BrowserGpuMemoryBufferManager::
+                     HandleGpuMemoryBufferAttribsReceivedOnIO,
+                 base::Unretained(this), base::Unretained(request)));
+}
+
+void BrowserGpuMemoryBufferManager::GetGpuMemoryBufferAttribsOnIO(
+    const GetGpuMemoryBufferAttribsDelegate& delegate,
+    int client_id,
+    const BrowserGpuMemoryBufferManager::GetGpuMemoryBufferAttribsCallback&
+        callback) {
+  GpuProcessHost* host = GpuProcessHost::Get();
+  if (!host) {
+    callback.Run(gfx::GpuMemoryBufferAttribVector());
+  }
+  delegate.Run(host, client_id, callback);
+}
+
+gfx::GpuMemoryBufferAttribVector
+BrowserGpuMemoryBufferManager::GetGpuMemoryBufferAttribs() {
+  GetGpuMemoryBufferAttribsRequest request(gpu_client_id_);
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(
+          &BrowserGpuMemoryBufferManager::HandleGetGpuMemoryBufferAttribsOnIO,
+          base::Unretained(this), base::Unretained(&request)));
+
+  TRACE_EVENT0("browser",
+               "BrowserGpuMemoryBufferManager::GetGpuMemoryBufferAttribs");
+  base::ThreadRestrictions::ScopedAllowWait allow_wait;
+  request.event.Wait();
+  return request.result;
+}
+
 bool BrowserGpuMemoryBufferManager::OnMemoryDump(
     const base::trace_event::MemoryDumpArgs& args,
     base::trace_event::ProcessMemoryDump* pmd) {