Revert of Mac: Require child AllocateGpuMemoryBuffer to not fail

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"
 
@@ skipping 27 matching lines @@
                "width",
                size.width(),
                "height",
                size.height());
 
   gfx::GpuMemoryBufferHandle handle;
   IPC::Message* message = new ChildProcessHostMsg_SyncAllocateGpuMemoryBuffer(
       content::GetNextGenericSharedMemoryId(), size.width(), size.height(),
       format, usage, &handle);
   bool success = sender_->Send(message);
-  CHECK(success);
-  CHECK(!handle.is_null());
+  if (!success || handle.is_null())
+    return nullptr;
 
   scoped_ptr<GpuMemoryBufferImpl> buffer(GpuMemoryBufferImpl::CreateFromHandle(
       handle, size, format, usage,
       base::Bind(&DeletedGpuMemoryBuffer, sender_, handle.id)));
-  CHECK(buffer);
+  if (!buffer) {
+    sender_->Send(new ChildProcessHostMsg_DeletedGpuMemoryBuffer(
+        handle.id, gpu::SyncToken()));
+    return nullptr;
+  }
+
   return buffer.Pass();
 }
 
 scoped_ptr<gfx::GpuMemoryBuffer>
 ChildGpuMemoryBufferManager::CreateGpuMemoryBufferFromHandle(
     const gfx::GpuMemoryBufferHandle& handle,
     const gfx::Size& size,
     gfx::BufferFormat format) {
   NOTIMPLEMENTED();
   return nullptr;
 }
 
 gfx::GpuMemoryBuffer*
 ChildGpuMemoryBufferManager::GpuMemoryBufferFromClientBuffer(
     ClientBuffer buffer) {
   return GpuMemoryBufferImpl::FromClientBuffer(buffer);
 }
 
 void ChildGpuMemoryBufferManager::SetDestructionSyncToken(
     gfx::GpuMemoryBuffer* buffer,
     const gpu::SyncToken& sync_token) {
   static_cast<GpuMemoryBufferImpl*>(buffer)
       ->set_destruction_sync_token(sync_token);
 }
 
 }  // namespace content