Move MouseCaptureLost to base implementation.

MouseCaptureLost is a signal from the browser that capture has been
lost. It was getting overridden for WebViews to also release the mouse
capture if it was necessary. This has been changed to a separate call
in https://chromium-review.googlesource.com/c/chromium/src/+/2541202
and now the common implementation can be moved into base.

BUG=1097816

Change-Id: Ic545e543805e0df72dfe11821f02f5f5971844a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2542845
Commit-Queue: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: danakj <danakj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828718}

third_party/blink/renderer/core/exported/web_view_impl.cc

@@ -1787,13 +1787,6 @@ bool WebViewImpl::HasVerticalScrollbar() {
   return MainFrameImpl()->GetFrameView()->LayoutViewport()->VerticalScrollbar();
 }
 
-void WebViewImpl::MouseCaptureLost() {
-  TRACE_EVENT_NESTABLE_ASYNC_END0("input", "capturing mouse",
-                                  TRACE_ID_LOCAL(this));
-  if (page_->DeprecatedLocalMainFrame())
-    page_->DeprecatedLocalMainFrame()->Client()->SetMouseCapture(false);
-}
-
 void WebViewImpl::SetFocus(bool enable) {
   if (enable)
     page_->GetFocusController().SetActive(true);

third_party/blink/renderer/core/exported/web_view_impl.h

@@ -529,7 +529,6 @@ class CORE_EXPORT WebViewImpl final : public WebView,
   // These are temporary methods to allow WebViewFrameWidget to delegate to
   // WebViewImpl. We expect to eventually move these out.
   void ThemeChanged();
-  void MouseCaptureLost();
   void SetFocus(bool enable) override;
 
   // Update the target url locally and tell the browser that the target URL has

third_party/blink/renderer/core/frame/web_frame_widget_base.cc

@@ -2019,6 +2019,12 @@ void WebFrameWidgetBase::RequestMouseLock(
   }
 }
 
+void WebFrameWidgetBase::MouseCaptureLost() {
+  TRACE_EVENT_NESTABLE_ASYNC_END0("input", "capturing mouse",
+                                  TRACE_ID_LOCAL(this));
+  mouse_capture_element_ = nullptr;
+}
+
 void WebFrameWidgetBase::ApplyVisualProperties(
     const VisualProperties& visual_properties) {
   widget_base_->UpdateVisualProperties(visual_properties);

third_party/blink/renderer/core/frame/web_frame_widget_base.h

@@ -265,6 +265,7 @@ class CORE_EXPORT WebFrameWidgetBase
       bool request_unadjusted_movement,
       mojom::blink::WidgetInputHandlerHost::RequestMouseLockCallback callback)
       override;
+  void MouseCaptureLost() override;
   bool CanComposeInline() override;
   bool ShouldDispatchImeEventsToPlugin() override;
   void ImeSetCompositionForPlugin(const String& text,

third_party/blink/renderer/core/frame/web_frame_widget_impl.cc

@@ -334,12 +334,6 @@ bool WebFrameWidgetImpl::ScrollFocusedEditableElementIntoView() {
   return true;
 }
 
-void WebFrameWidgetImpl::MouseCaptureLost() {
-  TRACE_EVENT_NESTABLE_ASYNC_END0("input", "capturing mouse",
-                                  TRACE_ID_LOCAL(this));
-  mouse_capture_element_ = nullptr;
-}
-
 void WebFrameWidgetImpl::FocusChanged(bool enable) {
   if (enable)
     GetPage()->GetFocusController().SetActive(true);

third_party/blink/renderer/core/frame/web_frame_widget_impl.h

@@ -92,8 +92,6 @@ class WebFrameWidgetImpl final : public WebFrameWidgetBase {
   gfx::Size Size() override;
   void Resize(const gfx::Size&) override;
 
-  void MouseCaptureLost() override;
-
   // WebFrameWidget implementation.
   bool ScrollFocusedEditableElementIntoView() override;
 

third_party/blink/renderer/core/frame/web_view_frame_widget.cc

@@ -92,11 +92,6 @@ void WebViewFrameWidget::Resize(const gfx::Size& size) {
   web_view_->Resize(size);
 }
 
-void WebViewFrameWidget::MouseCaptureLost() {
-  mouse_capture_element_ = nullptr;
-  web_view_->MouseCaptureLost();
-}
-
 void WebViewFrameWidget::FocusChanged(bool enable) {
   web_view_->SetFocus(enable);
 }

third_party/blink/renderer/core/frame/web_view_frame_widget.h

@@ -64,7 +64,6 @@ class CORE_EXPORT WebViewFrameWidget : public WebFrameWidgetBase {
       scoped_refptr<base::SingleThreadTaskRunner> cleanup_runner) override;
   gfx::Size Size() override;
   void Resize(const gfx::Size& size_with_dsf) override;
-  void MouseCaptureLost() override;
 
   // WebFrameWidget overrides:
   bool ScrollFocusedEditableElementIntoView() override;