gpu: Directly cast ClientBuffer to gfx::GpuMemoryBuffer

content/browser/gpu/browser_gpu_memory_buffer_manager.cc

Index: content/browser/gpu/browser_gpu_memory_buffer_manager.cc
diff --git a/content/browser/gpu/browser_gpu_memory_buffer_manager.cc b/content/browser/gpu/browser_gpu_memory_buffer_manager.cc
index a63fc08da1a3b8d2bd5c3c53825894e3c978ebd3..51aeb5eb39c59bb465d77a6da4b2453df8d4affe 100644
--- a/content/browser/gpu/browser_gpu_memory_buffer_manager.cc
+++ b/content/browser/gpu/browser_gpu_memory_buffer_manager.cc
@@ -291,12 +291,6 @@ void BrowserGpuMemoryBufferManager::AllocateGpuMemoryBufferForChildProcess(
       id, size, format, child_process_handle));
 }
 
-gfx::GpuMemoryBuffer*
-BrowserGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
-    ClientBuffer buffer) {
-  return gpu::GpuMemoryBufferImpl::FromClientBuffer(buffer);
-}
-
 void BrowserGpuMemoryBufferManager::SetDestructionSyncToken(
     gfx::GpuMemoryBuffer* buffer,
     const gpu::SyncToken& sync_token) {