Re-add snap-back behavior (Chrome side)

content/renderer/renderer_webkitplatformsupport_impl.cc

 // Copyright (c) 2012 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 "content/renderer/renderer_webkitplatformsupport_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/lazy_instance.h"
 #include "base/memory/shared_memory.h"
@@ skipping 59 matching lines @@
 #include "third_party/WebKit/public/platform/WebMediaStreamCenter.h"
 #include "third_party/WebKit/public/platform/WebMediaStreamCenterClient.h"
 #include "third_party/WebKit/public/platform/WebPluginListBuilder.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebVector.h"
 #include "ui/gfx/color_profile.h"
 #include "url/gurl.h"
 #include "webkit/common/gpu/context_provider_web_context.h"
 #include "webkit/common/quota/quota_types.h"
 
-#if defined(OS_WIN)
-#include "content/common/child_process_messages.h"
-#include "third_party/WebKit/public/platform/win/WebSandboxSupport.h"
+#if defined(OS_ANDROID)
+#include "content/renderer/media/android/audio_decoder_android.h"
 #endif
 
 #if defined(OS_MACOSX)
 #include "content/common/mac/font_descriptor.h"
 #include "content/common/mac/font_loader.h"
+#include "content/renderer/webscrollbarbehavior_impl_mac.h"
 #include "third_party/WebKit/public/platform/mac/WebSandboxSupport.h"
 #endif
 
-#if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
+#if defined(OS_POSIX)
+#include "base/file_descriptor_posix.h"
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 #include <map>
 #include <string>
 
 #include "base/synchronization/lock.h"
 #include "content/common/child_process_sandbox_support_impl_linux.h"
 #include "third_party/WebKit/public/platform/linux/WebFontFamily.h"
 #include "third_party/WebKit/public/platform/linux/WebSandboxSupport.h"
 #include "third_party/icu/source/common/unicode/utf16.h"
 #endif
-
-#if defined(OS_POSIX)
-#include "base/file_descriptor_posix.h"
 #endif
 
-#if defined(OS_ANDROID)
-#include "content/renderer/media/android/audio_decoder_android.h"
+#if defined(OS_WIN)
+#include "content/common/child_process_messages.h"
+#include "third_party/WebKit/public/platform/win/WebSandboxSupport.h"
+#endif
+
+#if defined(TOOLKIT_GTK) || defined(USE_AURA)
+#include "content/renderer/webscrollbarbehavior_impl_gtkoraura.h"
+#elif !defined(OS_MACOSX)
+#include "third_party/WebKit/public/platform/WebScrollbarBehavior.h"
+#define WebScrollbarBehaviorImpl blink::WebScrollbarBehavior
 #endif
 
 using blink::Platform;
 using blink::WebAudioDevice;
 using blink::WebBlobRegistry;
 using blink::WebDatabaseObserver;
 using blink::WebFileInfo;
 using blink::WebFileSystem;
 using blink::WebGamepads;
 using blink::WebIDBFactory;
@@ skipping 86 matching lines @@
 #endif  // defined(OS_ANDROID)
 
 //------------------------------------------------------------------------------
 
 RendererWebKitPlatformSupportImpl::RendererWebKitPlatformSupportImpl()
     : clipboard_client_(new RendererClipboardClient),
       clipboard_(new WebClipboardImpl(clipboard_client_.get())),
       mime_registry_(new RendererWebKitPlatformSupportImpl::MimeRegistry),
       sudden_termination_disables_(0),
       plugin_refresh_allowed_(true),
-      child_thread_loop_(base::MessageLoopProxy::current()) {
+      child_thread_loop_(base::MessageLoopProxy::current()),
+      web_scrollbar_behavior_(new WebScrollbarBehaviorImpl) {
   if (g_sandbox_enabled && sandboxEnabled()) {
     sandbox_support_.reset(
         new RendererWebKitPlatformSupportImpl::SandboxSupport);
   } else {
     DVLOG(1) << "Disabling sandbox support for testing.";
   }
 
   // ChildThread may not exist in some tests.
   if (ChildThread::current()) {
     sync_message_filter_ = ChildThread::current()->sync_message_filter();
@@ skipping 651 matching lines @@
 #else
   // On other platforms, the primary monitor color profile can be read
   // directly.
   gfx::ColorProfile profile;
   *to_profile = profile.profile();
 #endif
 }
 
 //------------------------------------------------------------------------------
 
+blink::WebScrollbarBehavior*
+    RendererWebKitPlatformSupportImpl::scrollbarBehavior() {
+  return web_scrollbar_behavior_.get();
+}
+
+//------------------------------------------------------------------------------
+
 WebBlobRegistry* RendererWebKitPlatformSupportImpl::blobRegistry() {
   // blob_registry_ can be NULL when running some tests.
   return blob_registry_.get();
 }
 
 //------------------------------------------------------------------------------
 
 void RendererWebKitPlatformSupportImpl::sampleGamepads(WebGamepads& gamepads) {
   if (g_test_gamepads == 0) {
     RenderThreadImpl::current()->SampleGamepads(&gamepads);
@@ skipping 244 matching lines @@
     return;
   QuotaDispatcher::ThreadSpecificInstance(
       thread_safe_sender_.get(),
       quota_message_filter_.get())->QueryStorageUsageAndQuota(
           storage_partition,
           static_cast<quota::StorageType>(type),
           QuotaDispatcher::CreateWebStorageQuotaCallbacksWrapper(callbacks));
 }
 
 }  // namespace content