Remove function level static initializers media library initialization.

media/base/media.cc

+// Copyright 2013 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 "media/base/media.h"
+
+#include "base/files/file_path.h"
+#include "base/lazy_instance.h"
+#include "base/path_service.h"
+#include "base/synchronization/lock.h"
+#include "build/build_config.h"
+
+namespace media {
+
+namespace internal {
+// Platform specific initialization method.
+extern bool InitializeMediaLibraryInternal(const base::FilePath& module_dir,
+                                           bool for_testing);
+}  // namespace internal
+
+// Media must only be initialized once, so use a LazyInstance to ensure this.
+class MediaInitializer {
+ public:
+  bool Initialize(const base::FilePath& module_dir, bool for_testing) {
+    base::AutoLock auto_lock(lock_);
+    if (!tried_initialize_) {
+      tried_initialize_ = true;
+      initialized_ = internal::InitializeMediaLibraryInternal(
+          module_dir, for_testing);
+    }
+    return initialized_;
+  }
+
+  bool IsInitialized() {
+    base::AutoLock auto_lock(lock_);
+    return initialized_;
+  }
+
+ private:
+  friend struct base::DefaultLazyInstanceTraits<MediaInitializer>;
+
+  MediaInitializer()
+      : initialized_(false),
+        tried_initialize_(false) {
+    // TODO(dalecurtis): Add initialization of YUV and VectorMath libraries.
+  }
+
+  ~MediaInitializer() {
+    NOTREACHED() << "MediaInitializer should be leaky!";
+  }
+
+  base::Lock lock_;
+  bool initialized_;
+  bool tried_initialize_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaInitializer);
+};
+
+static base::LazyInstance<MediaInitializer>::Leaky g_media_library =
+    LAZY_INSTANCE_INITIALIZER;
+
+bool InitializeMediaLibrary(const base::FilePath& module_dir) {
+  return g_media_library.Get().Initialize(module_dir, false);
+}
+
+void InitializeMediaLibraryForTesting() {
+  base::FilePath module_dir;
+  CHECK(PathService::Get(base::DIR_EXE, &module_dir));
+  CHECK(g_media_library.Get().Initialize(module_dir, true));
+}
+
+bool IsMediaLibraryInitialized() {
+  return g_media_library.Get().IsInitialized();
+}
+
+}  // namespace media