content: implement unittests backend for Ozone GBM

content/test/content_test_suite.cc

Index: content/test/content_test_suite.cc
diff --git a/content/test/content_test_suite.cc b/content/test/content_test_suite.cc
index f7099dc369199518353f46ef4b43e2a3a93b6795..a3b5a645bb7c07b561f2762218efa30c3abef50a 100644
--- a/content/test/content_test_suite.cc
+++ b/content/test/content_test_suite.cc
@@ -7,6 +7,7 @@
 #include "base/base_paths.h"
 #include "base/base_switches.h"
 #include "base/logging.h"
+#include "base/message_loop/message_loop.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_paths.h"
 #include "content/public/test/test_content_client_initializer.h"
@@ -74,6 +75,9 @@ ContentTestSuite::~ContentTestSuite() {
 }
 
 void ContentTestSuite::Initialize() {
+  // Especially Ozone needs MessageLoopForUI.
+  scoped_ptr<base::MessageLoop> message_loop(new base::MessageLoopForUI);
+
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool autorelease_pool;
 #if !defined(OS_IOS)
@@ -84,6 +88,10 @@ void ContentTestSuite::Initialize() {
 #if defined(OS_WIN)
   gfx::InitDeviceScaleFactor(1.0f);
 #endif
+#if defined(USE_OZONE)
+  ozone_ = ui::OzoneInitializerForTest::Create();

[spang, 2015/12/14 17:51:37]

Can you just call ui::OzonePlatform::InitializeForUI here?

I do not think we want a OzoneInitializerForTest. What this is initializing is
the UI.

[dshwang, 2015/12/15 03:44:00]

What OzoneInitializerForTest is doing is to initialize both UI and GPU and wait
for all communications.
Especially unittests must wait for UI opening drm card0 and GPU receiving the
drm fd.

We can replace it with
OzonePlatform::InitializeForUI();
OzonePlatform::InitializeForGPU();
gpu_helper_.reset(new OzoneGpuTestHelper);
if (!gpu_helper_->Initialize(base::ThreadTaskRunnerHandle::Get(),
                             base::ThreadTaskRunnerHandle::Get())) {
  return false;
}
{
  base::MessageLoop::ScopedNestableTaskAllower allow(
      base::MessageLoop::current());
  base::RunLoop().RunUntilIdle();
}

OzoneInitializerForTest abstract these code.

+  DCHECK(ozone_);
+#endif
 
   ContentTestSuiteBase::Initialize();
   {