Add TransferBufferInterface::shared_memory_handle()

gpu/command_buffer/client/gles2_implementation_unittest.cc

Index: gpu/command_buffer/client/gles2_implementation_unittest.cc
diff --git a/gpu/command_buffer/client/gles2_implementation_unittest.cc b/gpu/command_buffer/client/gles2_implementation_unittest.cc
index 20c2508b60cd7877707e91dafb8779d874847102..6bb2dc50fec44518cecc3fbb58c232f46c01b414 100644
--- a/gpu/command_buffer/client/gles2_implementation_unittest.cc
+++ b/gpu/command_buffer/client/gles2_implementation_unittest.cc
@@ -131,6 +131,7 @@ class MockTransferBuffer : public TransferBufferInterface {
 
   ~MockTransferBuffer() override {}
 
+  base::SharedMemoryHandle shared_memory_handle() const override;
   bool Initialize(unsigned int starting_buffer_size,
                   unsigned int result_size,
                   unsigned int /* min_buffer_size */,
@@ -243,6 +244,10 @@ class MockTransferBuffer : public TransferBufferInterface {
   DISALLOW_COPY_AND_ASSIGN(MockTransferBuffer);
 };
 
+base::SharedMemoryHandle MockTransferBuffer::shared_memory_handle() const {
+  return base::SharedMemoryHandle();
+}
+
 bool MockTransferBuffer::Initialize(
     unsigned int starting_buffer_size,
     unsigned int result_size,