gpu: Directly cast ClientBuffer to gfx::GpuMemoryBuffer

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 3cef2b7937e04ef07d2b6d6638d22aec75768c5c..2bc4755945117f8a3a484d02c9424ff4466676c0 100644
--- a/content/child/child_gpu_memory_buffer_manager.cc
+++ b/content/child/child_gpu_memory_buffer_manager.cc
@@ -77,12 +77,6 @@ ChildGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
   return nullptr;
 }
 
-gfx::GpuMemoryBuffer*
-ChildGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
-    ClientBuffer buffer) {
-  return gpu::GpuMemoryBufferImpl::FromClientBuffer(buffer);
-}
-
 void ChildGpuMemoryBufferManager::SetDestructionSyncToken(
     gfx::GpuMemoryBuffer* buffer,
     const gpu::SyncToken& sync_token) {