Switch audio synchronization from sleep() based to select() based.

content/renderer/pepper/pepper_audio_input_host.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.
 
 #include "content/renderer/pepper/pepper_audio_input_host.h"
 
 #include "base/logging.h"
 #include "build/build_config.h"
 #include "content/renderer/pepper/pepper_media_device_manager.h"
 #include "content/renderer/pepper/pepper_platform_audio_input.h"
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 #include "content/renderer/pepper/renderer_ppapi_host_impl.h"
 #include "content/renderer/render_view_impl.h"
 #include "ipc/ipc_message.h"
-#include "media/audio/shared_memory_util.h"
 #include "ppapi/c/pp_errors.h"
 #include "ppapi/host/dispatch_host_message.h"
 #include "ppapi/host/ppapi_host.h"
 #include "ppapi/proxy/ppapi_messages.h"
 #include "ppapi/proxy/serialized_structs.h"
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebElement.h"
 #include "third_party/WebKit/public/web/WebPluginContainer.h"
 
 namespace content {
@@ skipping 136 matching lines @@
       ppapi::proxy::SerializedHandle::SHARED_MEMORY);
 
   if (result == PP_OK) {
     IPC::PlatformFileForTransit temp_socket =
         IPC::InvalidPlatformFileForTransit();
     base::SharedMemoryHandle temp_shmem = base::SharedMemory::NULLHandle();
     result = GetRemoteHandles(
         scoped_socket, scoped_shared_memory, &temp_socket, &temp_shmem);
 
     serialized_socket_handle.set_socket(temp_socket);
-    // Note that we must call TotalSharedMemorySizeInBytes() because extra space
-    // in shared memory is allocated for book-keeping, so the actual size of the
-    // shared memory buffer is larger than |shared_memory_size|. When sending to
-    // NaCl, NaClIPCAdapter expects this size to match the size of the full
-    // shared memory buffer.
-    serialized_shared_memory_handle.set_shmem(
-        temp_shmem, media::TotalSharedMemorySizeInBytes(shared_memory_size));
+    serialized_shared_memory_handle.set_shmem(temp_shmem, shared_memory_size);
   }
 
   // Send all the values, even on error. This simplifies some of our cleanup
   // code since the handles will be in the other process and could be
   // inconvenient to clean up. Our IPC code will automatically handle this for
   // us, as long as the remote side always closes the handles it receives, even
   // in the failure case.
   open_context_->params.set_result(result);
   open_context_->params.AppendHandle(serialized_socket_handle);
   open_context_->params.AppendHandle(serialized_shared_memory_handle);
@@ skipping 29 matching lines @@
 
   if (open_context_) {
     open_context_->params.set_result(PP_ERROR_ABORTED);
     host()->SendReply(*open_context_, PpapiPluginMsg_AudioInput_OpenReply());
     open_context_.reset();
   }
 }
 
 }  // namespace content