Add GenericSharedMemoryId and use w/ GpuMemoryBuffer

content/child/child_gpu_memory_buffer_manager.cc

 // Copyright 2014 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 "content/child/child_gpu_memory_buffer_manager.h"
 
 #include "content/common/child_process_messages.h"
+#include "content/common/generic_shared_memory_id_generator.h"
 #include "content/common/gpu/client/gpu_memory_buffer_impl.h"
 
 namespace content {
 namespace {
 
 void DeletedGpuMemoryBuffer(ThreadSafeSender* sender,
                             gfx::GpuMemoryBufferId id,
                             uint32 sync_point) {
   TRACE_EVENT0("renderer",
                "ChildGpuMemoryBufferManager::DeletedGpuMemoryBuffer");
@@ skipping 16 matching lines @@
                                                      gfx::BufferUsage usage) {
   TRACE_EVENT2("renderer",
                "ChildGpuMemoryBufferManager::AllocateGpuMemoryBuffer",
                "width",
                size.width(),
                "height",
                size.height());
 
   gfx::GpuMemoryBufferHandle handle;
   IPC::Message* message = new ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer(
-      size.width(), size.height(), format, usage, &handle);
+      content::GetNextGenericSharedMemoryId(), size.width(), size.height(),
+      format, usage, &handle);
   bool success = sender_->Send(message);
   if (!success || handle.is_null())
     return nullptr;
 
   scoped_ptr<GpuMemoryBufferImpl> buffer(GpuMemoryBufferImpl::CreateFromHandle(
       handle, size, format, usage,
       base::Bind(&DeletedGpuMemoryBuffer, sender_, handle.id)));
   if (!buffer) {
     sender_->Send(new ChildProcessHostMsg_DeletedGpuMemoryBuffer(handle.id, 0));
     return nullptr;
   }
 
   return buffer.Pass();
 }
 
 gfx::GpuMemoryBuffer*
 ChildGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
     ClientBuffer buffer) {
   return GpuMemoryBufferImpl::FromClientBuffer(buffer);
 }
 
 void ChildGpuMemoryBufferManager::SetDestructionSyncPoint(
     gfx::GpuMemoryBuffer* buffer,
     uint32 sync_point) {
   static_cast<GpuMemoryBufferImpl*>(buffer)
       ->set_destruction_sync_point(sync_point);
 }
 
 }  // namespace content