Make transfer buffer reallocate at default size.

gpu/command_buffer/client/transfer_buffer.h

Index: gpu/command_buffer/client/transfer_buffer.h
diff --git a/gpu/command_buffer/client/transfer_buffer.h b/gpu/command_buffer/client/transfer_buffer.h
index 0921b7464b8336aa7447377e736f1368124cc402..a8b7d736515981305d747f8c9116a52570793e1d 100644
--- a/gpu/command_buffer/client/transfer_buffer.h
+++ b/gpu/command_buffer/client/transfer_buffer.h
@@ -92,7 +92,7 @@ class GPU_EXPORT TransferBuffer : public TransferBufferInterface {
 
   // Overridden from TransferBufferInterface.
   virtual bool Initialize(
-      unsigned int buffer_size,
+      unsigned int default_buffer_size,
       unsigned int result_size,
       unsigned int min_buffer_size,
       unsigned int max_buffer_size,
@@ -125,6 +125,9 @@ class GPU_EXPORT TransferBuffer : public TransferBufferInterface {
   // size reserved for results
   unsigned int result_size_;
 
+  // default size. Size we want when starting or re-allocating
+  unsigned int default_buffer_size_;
+
   // min size we'll consider successful
   unsigned int min_buffer_size_;