Enforce a memory limit on MappedMemoryManager

content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 #define CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 58 matching lines @@
  protected:
   virtual ~WebGraphicsContext3DSwapBuffersClient() {}
 };
 
 class WebGraphicsContext3DErrorMessageCallback;
 
 class WebGraphicsContext3DCommandBufferImpl
     : public WebKit::WebGraphicsContext3D,
       public base::SupportsWeakPtr<WebGraphicsContext3DCommandBufferImpl> {
  public:
+  enum MappedMemoryReclaimLimit {
+    kNoLimit = 0,
+  };
+
   WebGraphicsContext3DCommandBufferImpl(
       int surface_id,
       const GURL& active_url,
       GpuChannelHostFactory* factory,
       const base::WeakPtr<WebGraphicsContext3DSwapBuffersClient>& swap_client);
 
   virtual ~WebGraphicsContext3DCommandBufferImpl();
 
   bool Initialize(const Attributes& attributes,
                   bool bind_generates_resources,
                   CauseForGpuLaunch cause,
                   size_t command_buffer_size,
                   size_t start_transfer_buffer_size,
                   size_t min_transfer_buffer_size,
-                  size_t max_transfer_buffer_size);
+                  size_t max_transfer_buffer_size,
+                  size_t mapped_memory_reclaim_limit);
 
   bool InitializeWithDefaultBufferSizes(const Attributes& attributes,
                                         bool bind_generates_resources,
                                         CauseForGpuLaunch cause);
 
   // The following 3 IDs let one uniquely identify this context.
   // Gets the GPU process ID for this context.
   int GetGPUProcessID();
 
   // Gets the channel ID for this context.
@@ skipping 646 matching lines @@
   scoped_ptr<gpu::gles2::GLES2Implementation> real_gl_;
   scoped_ptr<gpu::gles2::GLES2Interface> trace_gl_;
   Error last_error_;
   int frame_number_;
   bool bind_generates_resources_;
   bool use_echo_for_swap_ack_;
   size_t command_buffer_size_;
   size_t start_transfer_buffer_size_;
   size_t min_transfer_buffer_size_;
   size_t max_transfer_buffer_size_;
+  size_t mapped_memory_limit_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_WEBGRAPHICSCONTEXT3D_COMMAND_BUFFER_IMPL_H_