Add PERSISTENT_MAP usage for GpuMemoryBuffers.

content/browser/renderer_host/render_process_host_impl.cc

 // 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1114 matching lines @@
   DCHECK_IMPLIES(IsZeroCopyUploadEnabled(), !IsOneCopyUploadEnabled());
   DCHECK_IMPLIES(IsOneCopyUploadEnabled(), !IsZeroCopyUploadEnabled());
   if (IsZeroCopyUploadEnabled())
     command_line->AppendSwitch(switches::kEnableZeroCopy);
   if (!IsOneCopyUploadEnabled())
     command_line->AppendSwitch(switches::kDisableOneCopy);
 
   if (IsForceGpuRasterizationEnabled())
     command_line->AppendSwitch(switches::kForceGpuRasterization);
 
+  // TODO(reveman): We currently assume that the compositor will use BGRA_8888
+  // if it's able to, and RGBA_8888 otherwise. Since we don't know what it will
+  // use we hardcode BGRA_8888 here for now. We should instead
+  // move decisions about GpuMemoryBuffer format to the browser embedder so we
+  // know it here, and pass that decision to the compositor for each usage.
+  gfx::GpuMemoryBuffer::Format format = gfx::GpuMemoryBuffer::BGRA_8888;
+
+  // TODO(danakj): When one-copy uploads support partial update, change this
+  // usage to PERSISTENT_MAP for one-copy.
+  gfx::GpuMemoryBuffer::Usage usage = gfx::GpuMemoryBuffer::MAP;
+
   command_line->AppendSwitchASCII(
       switches::kUseImageTextureTarget,
       base::UintToString(
-          BrowserGpuChannelHostFactory::GetImageTextureTarget()));
+          BrowserGpuChannelHostFactory::GetImageTextureTarget(format, usage)));
 
   // Appending disable-gpu-feature switches due to software rendering list.
   GpuDataManagerImpl* gpu_data_manager = GpuDataManagerImpl::GetInstance();
   DCHECK(gpu_data_manager);
   gpu_data_manager->AppendRendererCommandLine(command_line);
 }
 
 void RenderProcessHostImpl::AppendRendererCommandLine(
     base::CommandLine* command_line) const {
   // Pass the process type first, so it shows first in process listings.
@@ skipping 1304 matching lines @@
   if (worker_ref_count_ == 0)
     Cleanup();
 }
 
 void RenderProcessHostImpl::GetAudioOutputControllers(
     const GetAudioOutputControllersCallback& callback) const {
   audio_renderer_host()->GetOutputControllers(callback);
 }
 
 }  // namespace content