gpu: Refactor GpuMemoryBuffer framework for multi-process support.

gpu/command_buffer/client/gl_in_process_context.h

Index: gpu/command_buffer/client/gl_in_process_context.h
diff --git a/gpu/command_buffer/client/gl_in_process_context.h b/gpu/command_buffer/client/gl_in_process_context.h
index 09f8140ee0e87e34fc7452aabd2f8b365309eaf2..7e924b5b113dc4809865f560c0c0ce60d43bf56a 100644
--- a/gpu/command_buffer/client/gl_in_process_context.h
+++ b/gpu/command_buffer/client/gl_in_process_context.h
@@ -22,8 +22,6 @@ namespace gles2 {
 class GLES2Implementation;
 }
 
-class GpuMemoryBufferFactory;
-
 // The default uninitialized value is -1.
 struct GLES2_IMPL_EXPORT GLInProcessContextAttribs {
   GLInProcessContextAttribs();
@@ -42,9 +40,6 @@ class GLES2_IMPL_EXPORT GLInProcessContext {
  public:
   virtual ~GLInProcessContext() {}
 
-  // Must be called before any GLInProcessContext instances are created.
-  static void SetGpuMemoryBufferFactory(GpuMemoryBufferFactory* factory);
-
   // Create a GLInProcessContext, if |is_offscreen| is true, renders to an
   // offscreen context. |attrib_list| must be NULL or a NONE-terminated list
   // of attribute/value pairs.