ui: Add support for creating GLImage instances from shared memory pools.

content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h

Index: content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h
diff --git a/content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h b/content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h
index 6828ad51d0370ea1ada0998c103dbc2a9a31017c..0fd93c1c0b9b51f7d05e91ac5fac114d68283aff 100644
--- a/content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h
+++ b/content/common/gpu/client/gpu_memory_buffer_impl_shared_memory.h
@@ -58,9 +58,11 @@ class CONTENT_EXPORT GpuMemoryBufferImplSharedMemory
                                   const gfx::Size& size,
                                   gfx::BufferFormat format,
                                   const DestructionCallback& callback,
-                                  scoped_ptr<base::SharedMemory> shared_memory);
+                                  scoped_ptr<base::SharedMemory> shared_memory,
+                                  off_t offset);
 
   scoped_ptr<base::SharedMemory> shared_memory_;
+  off_t offset_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuMemoryBufferImplSharedMemory);
 };