Remove CreateGpuMemoryBufferFromClientId and plumbing

content/child/child_gpu_memory_buffer_manager.cc

Index: content/child/child_gpu_memory_buffer_manager.cc
diff --git a/content/child/child_gpu_memory_buffer_manager.cc b/content/child/child_gpu_memory_buffer_manager.cc
index b51a74dfe0309ac44d40064639d9fe58ae9c488c..3cef2b7937e04ef07d2b6d6638d22aec75768c5c 100644
--- a/content/child/child_gpu_memory_buffer_manager.cc
+++ b/content/child/child_gpu_memory_buffer_manager.cc
@@ -77,14 +77,6 @@ ChildGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
   return nullptr;
 }
 
-std::unique_ptr<gfx::GpuMemoryBuffer>
-ChildGpuMemoryBufferManager::CreateGpuMemoryBufferFromClientId(
-    int client_id,
-    const gfx::GpuMemoryBufferId& gpu_memory_buffer_id) {
-  NOTIMPLEMENTED();
-  return nullptr;
-}
-
 gfx::GpuMemoryBuffer*
 ChildGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
     ClientBuffer buffer) {