exo: Directly create GpuMemoryBufferImpl when a handle is available.

blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.cc

Index: blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.cc
diff --git a/blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.cc b/blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.cc
index 2a3d478761a6a78e3e56b52e5f059482b6ce26a9..fef42d404e8345cad2d341719313d5c640da3f9d 100644
--- a/blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.cc
+++ b/blimp/client/support/compositor/blimp_gpu_memory_buffer_manager.cc
@@ -137,19 +137,6 @@ BlimpGpuMemoryBufferManager::CreateGpuMemoryBuffer(
           gfx::RowSizeForBufferFormat(size.width(), format, 0))));
 }
 
-std::unique_ptr<gfx::GpuMemoryBuffer>
-BlimpGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
-    const gfx::GpuMemoryBufferHandle& handle,
-    const gfx::Size& size,
-    gfx::BufferFormat format) {
-  if (handle.type != gfx::SHARED_MEMORY_BUFFER)
-    return nullptr;
-
-  return base::WrapUnique<gfx::GpuMemoryBuffer>(new GpuMemoryBufferImpl(
-      size, format, base::MakeUnique<base::SharedMemory>(handle.handle, false),
-      handle.offset, handle.stride));
-}
-
 void BlimpGpuMemoryBufferManager::SetDestructionSyncToken(
     gfx::GpuMemoryBuffer* buffer,
     const gpu::SyncToken& sync_token) {