Do not give GPU memory to backgrounded compositors.

cc/debug/test_context_provider.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/debug/test_context_provider.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 173 matching lines @@
 }
 
 TestWebGraphicsContext3D* TestContextProvider::UnboundTestContext3d() {
   DCHECK(context3d_);
   DCHECK(context_thread_checker_.CalledOnValidThread());
 
   return context3d_.get();
 }
 
 void TestContextProvider::SetMemoryAllocation(
-    const ManagedMemoryPolicy& policy,
-    bool discard_backbuffer_when_not_visible) {
+    const ManagedMemoryPolicy& policy) {
   if (memory_policy_changed_callback_.is_null())
     return;
-  memory_policy_changed_callback_.Run(
-      policy, discard_backbuffer_when_not_visible);
+  memory_policy_changed_callback_.Run(policy);
 }
 
 void TestContextProvider::SetLostContextCallback(
     const LostContextCallback& cb) {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   DCHECK(lost_context_callback_.is_null() || cb.is_null());
   lost_context_callback_ = cb;
 }
 
 void TestContextProvider::SetSwapBuffersCompleteCallback(
     const SwapBuffersCompleteCallback& cb) {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   DCHECK(swap_buffers_complete_callback_.is_null() || cb.is_null());
   swap_buffers_complete_callback_ = cb;
 }
 
 void TestContextProvider::SetMemoryPolicyChangedCallback(
     const MemoryPolicyChangedCallback& cb) {
   DCHECK(context_thread_checker_.CalledOnValidThread());
   DCHECK(memory_policy_changed_callback_.is_null() || cb.is_null());
   memory_policy_changed_callback_ = cb;
 }
 
 void TestContextProvider::SetMaxTransferBufferUsageBytes(
     size_t max_transfer_buffer_usage_bytes) {
   context3d_->SetMaxTransferBufferUsageBytes(max_transfer_buffer_usage_bytes);
 }
 
 }  // namespace cc