[Android] Use UIResource for overscroll glow

Introduce a SystemUIResourceManager class for loading and providing access to
shared UIResourceId's.  Wire this class to the existing OverscrollGlow effect,
using the shared id's with a UIResourceLayer for both glow and edge layers.

This patch is a subset of powei@'s original SystemUIResource patch found at
https://codereview.chromium.org/377013002/.

BUG=326326

Review URL: https://codereview.chromium.org/422013003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@288095 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 55 insertions, 0 deletions

diff --git a/content/browser/android/system_ui_resource_manager_impl.h b/content/browser/android/system_ui_resource_manager_impl.h
new file mode 100644
index 0000000..c5792a1
--- /dev/null
+++ b/content/browser/android/system_ui_resource_manager_impl.h
@@ -0,0 +1,55 @@
+// Copyright 2014 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.
+
+#ifndef CONTENT_BROWSER_ANDROID_SYSTEM_UI_RESOURCE_MANAGER_IMPL_H_
+#define CONTENT_BROWSER_ANDROID_SYSTEM_UI_RESOURCE_MANAGER_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/containers/scoped_ptr_hash_map.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "ui/base/android/system_ui_resource_manager.h"
+
+class SkBitmap;
+
+namespace cc {
+class UIResourceBitmap;
+}
+
+namespace content {
+
+class UIResourceProvider;
+
+class CONTENT_EXPORT SystemUIResourceManagerImpl
+    : public ui::SystemUIResourceManager {
+ public:
+  explicit SystemUIResourceManagerImpl(
+      UIResourceProvider* ui_resource_provider);
+  virtual ~SystemUIResourceManagerImpl();
+
+  virtual void PreloadResource(ResourceType type) OVERRIDE;
+  virtual cc::UIResourceId GetUIResourceId(ResourceType type) OVERRIDE;
+
+ private:
+  friend class TestSystemUIResourceManagerImpl;
+  class Entry;
+
+  // Start loading the resource bitmap.  virtual for testing.
+  virtual void BuildResource(ResourceType type);
+
+  Entry* GetEntry(ResourceType type);
+  static void LoadBitmap(ResourceType, SkBitmap* bitmap_holder);
+  void OnFinishedLoadBitmap(ResourceType, SkBitmap* bitmap_holder);
+
+  scoped_ptr<Entry> resource_map_[RESOURCE_TYPE_LAST + 1];
+  UIResourceProvider* ui_resource_provider_;
+
+  base::WeakPtrFactory<SystemUIResourceManagerImpl> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(SystemUIResourceManagerImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_ANDROID_SYSTEM_UI_RESOURCE_MANAGER_IMPL_H_