Convert Gamepad IPC messages into mojo interface.

content/browser/gamepad/gamepad_service.cc

Index: content/browser/gamepad/gamepad_service.cc
diff --git a/content/browser/gamepad/gamepad_service.cc b/content/browser/gamepad/gamepad_service.cc
index a742cc817f645fe716acfc81fc5ba60c39aac51e..7994616c70463f253aa022ccaf11e505a7c683b4 100644
--- a/content/browser/gamepad/gamepad_service.cc
+++ b/content/browser/gamepad/gamepad_service.cc
@@ -11,6 +11,7 @@
 #include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "content/browser/gamepad/gamepad_shared_buffer_impl.h"
+#include "content/common/gamepad_hardware_buffer.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "device/gamepad/gamepad_consumer.h"
@@ -153,6 +154,16 @@ base::SharedMemoryHandle GamepadService::GetSharedMemoryHandleForProcess(
   return provider_->GetSharedMemoryHandleForProcess(handle);
 }
 
+mojo::ScopedSharedBufferHandle GamepadService::GetSharedMemoryHandle() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  // TODO(heke): Use mojo::SharedBuffer rather than base::Sharedmemory in
+  // GamepadSharedBuffer. See crbug.com/670655 for details.
+  return mojo::WrapSharedMemoryHandle(provider_->GetSharedMemoryHandle(),

[ke.he, 2016/12/06 09:51:27]

We add the "mojo::WrapSharedMemoryHandle(...)" here instead of adding it in
GamepadProvider because GamepadProvider is located in //device/ and cannot
"#include content/common/gamepad_hardware_buffer.h"

+                                      sizeof(GamepadHardwareBuffer),
+                                      true /* read_only */);
+}
+
 void GamepadService::OnUserGesture() {
   DCHECK(thread_checker_.CalledOnValidThread());