GPU: Buld most of the gpu as a single DLL.

gpu/command_buffer/service/buffer_manager.h

Index: gpu/command_buffer/service/buffer_manager.h
===================================================================
--- gpu/command_buffer/service/buffer_manager.h	(revision 124044)
+++ gpu/command_buffer/service/buffer_manager.h	(working copy)
@@ -12,6 +12,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "gpu/command_buffer/service/gl_utils.h"
+#include "gpu/gpu_export.h"
 
 namespace gpu {
 namespace gles2 {
@@ -21,10 +22,10 @@
 //
 // NOTE: To support shared resources an instance of this class will need to be
 // shared by multiple GLES2Decoders.
-class BufferManager {
+class GPU_EXPORT BufferManager {
  public:
   // Info about Buffers currently in the system.
-  class BufferInfo : public base::RefCounted<BufferInfo> {
+  class GPU_EXPORT BufferInfo : public base::RefCounted<BufferInfo> {
    public:
     typedef scoped_refptr<BufferInfo> Ref;