Initialize buffers before allowing access to them.

gpu/command_buffer/service/vertex_attrib_manager.h

Index: gpu/command_buffer/service/vertex_attrib_manager.h
diff --git a/gpu/command_buffer/service/vertex_attrib_manager.h b/gpu/command_buffer/service/vertex_attrib_manager.h
index 363e5c94bfaaf0faa70fc39e8e44585147b0c7fd..4a2796bfeee75e77b19b6a4389236c4a30fa21c7 100644
--- a/gpu/command_buffer/service/vertex_attrib_manager.h
+++ b/gpu/command_buffer/service/vertex_attrib_manager.h
@@ -20,6 +20,7 @@
 namespace gpu {
 namespace gles2 {
 
+class BufferManager;
 class FeatureInfo;
 class GLES2Decoder;
 class Program;
@@ -271,6 +272,7 @@ class GPU_EXPORT VertexAttribManager :
       const char* function_name,
       GLES2Decoder* decoder,
       FeatureInfo* feature_info,
+      BufferManager* buffer_manager,
       Program* current_program,
       GLuint max_vertex_accessed,
       bool instanced,
@@ -330,4 +332,3 @@ class GPU_EXPORT VertexAttribManager :
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_VERTEX_ATTRIB_MANAGER_H_
-