Revert of Introduce the devices Mojo app (patchset #5 id:160001 of https://codereview.chromium.org/1165223004/)

Reason for revert:
This broke the Win 8 GN (dbg) and Win x64 GN (dbg) bots:

https://build.chromium.org/p/chromium.win/builders/Win8%20GN%20%28dbg%29/builds/7453
https://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN%20%28dbg%29/builds/3219

Original issue's description:
> Introduce the devices Mojo app
>
> It's a small Mojo app that currently only hosts USB device
> services. This CL adds the app along with an apptest suite
> (run manually with mojo_runner mojo:devices_apptests).
>
> The app is hooked up to Chrome to run in the browser process,
> though there are currently no production code paths which
> cause the app to launch.
>
> BUG=498557
>
> Committed: https://crrev.com/ed800dc138edfa261aa766281b96f736ff9824f6
> Cr-Commit-Position: refs/heads/master@{#333899}

TBR=reillyg@chromium.org,sky@chromium.org,rockot@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=498557

Review URL: https://codereview.chromium.org/1176383002

Cr-Commit-Position: refs/heads/master@{#333942}

1 files changed, 30 insertions, 0 deletions

diff --git a/chrome/browser/chrome_device_client.cc b/chrome/browser/chrome_device_client.cc
index 835a4c3..d0a31a6 100644
--- a/chrome/browser/chrome_device_client.cc
+++ b/chrome/browser/chrome_device_client.cc
@@ -5,12 +5,34 @@
 #include "chrome/browser/chrome_device_client.h"
 
 #include "base/logging.h"
+#include "base/macros.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/hid/hid_service.h"
+#include "device/usb/public/cpp/device_manager_delegate.h"
+#include "device/usb/public/cpp/device_manager_factory.h"
+#include "device/usb/public/interfaces/device.mojom.h"
 #include "device/usb/usb_service.h"
 
 using content::BrowserThread;
 
+namespace {
+
+// DeviceManagerDelegate implementation which allows access to all devices.
+class BrowserDeviceManagerDelegate : public device::usb::DeviceManagerDelegate {
+ public:
+  BrowserDeviceManagerDelegate() {}
+  ~BrowserDeviceManagerDelegate() override {}
+
+ private:
+  bool IsDeviceAllowed(const device::usb::DeviceInfo& device) override {
+    return true;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserDeviceManagerDelegate);
+};
+
+}  // namespace
+
 ChromeDeviceClient::ChromeDeviceClient() {}
 
 ChromeDeviceClient::~ChromeDeviceClient() {}
@@ -21,6 +43,14 @@ device::UsbService* ChromeDeviceClient::GetUsbService() {
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::FILE));
 }
 
+void ChromeDeviceClient::ConnectToUSBDeviceManager(
+    mojo::InterfaceRequest<device::usb::DeviceManager> request) {
+  device::usb::DeviceManagerFactory::Build(
+      request.Pass(),
+      scoped_ptr<device::usb::DeviceManagerDelegate>(
+          new BrowserDeviceManagerDelegate));
+}
+
 device::HidService* ChromeDeviceClient::GetHidService() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return device::HidService::GetInstance(