Reset TexImage2D base level to workaround Intel mac driver bug

gpu/command_buffer/service/framebuffer_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 282 matching lines @@
   // bound image, 0x00 if not.
   uint32_t draw_buffer_bound_mask_;
   // This is the mask for the actual draw buffers sent to driver.
   uint32_t adjusted_draw_buffer_bound_mask_;
 
   GLenum read_buffer_;
 
   DISALLOW_COPY_AND_ASSIGN(Framebuffer);
 };
 
-struct DecoderFramebufferState {
+struct GPU_EXPORT DecoderFramebufferState {
   DecoderFramebufferState();
   ~DecoderFramebufferState();
 
   // State saved for clearing so we can clear render buffers and then
   // restore to these values.
   bool clear_state_dirty;
 
   // The currently bound framebuffers
   scoped_refptr<Framebuffer> bound_read_framebuffer;
   scoped_refptr<Framebuffer> bound_draw_framebuffer;
@@ skipping 69 matching lines @@
 
   scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_