command_buffer: Batch command processing to reduce handler overheads.

gpu/command_buffer/service/mocks.cc

Index: gpu/command_buffer/service/mocks.cc
diff --git a/gpu/command_buffer/service/mocks.cc b/gpu/command_buffer/service/mocks.cc
index 25598478bf8468986ddf05ef27a06daa1c5a6f07..143ec0b4d84d8d1f9d6b7d0b2073c769848cfd83 100644
--- a/gpu/command_buffer/service/mocks.cc
+++ b/gpu/command_buffer/service/mocks.cc
@@ -7,15 +7,31 @@
 #include "gpu/command_buffer/service/gpu_scheduler.h"
 #include "gpu/command_buffer/service/mocks.h"
 
+using testing::Invoke;
+using testing::_;
+
 namespace gpu {
 
-AsyncAPIMock::AsyncAPIMock() {
+AsyncAPIMock::AsyncAPIMock(bool default_do_commands) {
   testing::DefaultValue<error::Error>::Set(
       error::kNoError);
+
+  if (default_do_commands) {
+    ON_CALL(*this, DoCommands(_, _, _, _))
+        .WillByDefault(Invoke(this, &AsyncAPIMock::FakeDoCommands));
+  }
 }
 
 AsyncAPIMock::~AsyncAPIMock() {}
 
+error::Error AsyncAPIMock::FakeDoCommands(unsigned int num_commands,
+                                          const void* buffer,
+                                          int num_entries,
+                                          int* entries_processed) {
+  return AsyncAPIInterface::DoCommands(
+      num_commands, buffer, num_entries, entries_processed);
+}
+
 void AsyncAPIMock::SetToken(unsigned int command,
                             unsigned int arg_count,
                             const void* _args) {