Plumb native AppWindow input region through to window shape under Aura.

This CL also fixes gfk::NativeRegion leaks in DesktopRootWindowHost for Windows & X11.

BUG=310932

Review URL: https://codereview.chromium.org/54983005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233382 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/ui/views/apps/native_app_window_views.cc

@@ -842,6 +842,13 @@ SkRegion* NativeAppWindowViews::GetDraggableRegion() {
 
 void NativeAppWindowViews::UpdateInputRegion(scoped_ptr<SkRegion> region) {
   input_region_ = region.Pass();
+
+#if defined(USE_AURA)
+  if (input_region_)
+    window_->SetShape(new SkRegion(*input_region_));
+  else
+    window_->SetShape(NULL);
+#endif // defined(USE_AURA)
 }
 
 void NativeAppWindowViews::HandleKeyboardEvent(

ui/views/widget/desktop_aura/desktop_root_window_host.h

@@ -93,6 +93,8 @@ class VIEWS_EXPORT DesktopRootWindowHost {
 
   virtual gfx::Rect GetWorkAreaBoundsInScreen() const = 0;
 
+  // Sets the shape of the root window. If |native_region| is NULL then the
+  // window reverts to rectangular. Takes ownership of |native_region|.
   virtual void SetShape(gfx::NativeRegion native_region) = 0;
 
   virtual void Activate() = 0;

ui/views/widget/desktop_aura/desktop_root_window_host_win.cc

@@ -236,9 +236,15 @@ gfx::Rect DesktopRootWindowHostWin::GetWorkAreaBoundsInScreen() const {
 }
 
 void DesktopRootWindowHostWin::SetShape(gfx::NativeRegion native_region) {
+  if (native_region) {
     SkPath path;
     native_region->getBoundaryPath(&path);
     message_handler_->SetRegion(gfx::CreateHRGNFromSkPath(path));
+  } else {
+    message_handler_->SetRegion(NULL);
+  }
+
+  delete native_region;
 }
 
 void DesktopRootWindowHostWin::Activate() {

ui/views/widget/desktop_aura/desktop_root_window_host_x11.cc

@@ -433,11 +433,18 @@ gfx::Rect DesktopRootWindowHostX11::GetWorkAreaBoundsInScreen() const {
 }
 
 void DesktopRootWindowHostX11::SetShape(gfx::NativeRegion native_region) {
+  if (native_region) {
     SkPath path;
     native_region->getBoundaryPath(&path);
     Region region = gfx::CreateRegionFromSkPath(path);
-  XShapeCombineRegion(xdisplay_, xwindow_, ShapeBounding, 0, 0, region, false);
+    XShapeCombineRegion(
+        xdisplay_, xwindow_, ShapeBounding, 0, 0, region, false);
     XDestroyRegion(region);
+  } else {
+    ResetWindowRegion();
+  }
+
+  delete native_region;
 }
 
 void DesktopRootWindowHostX11::Activate() {

ui/views/widget/widget.h

@@ -419,7 +419,8 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
   // Places the widget below the specified NativeView.
   void StackBelow(gfx::NativeView native_view);
 
-  // Sets a shape on the widget. This takes ownership of shape.
+  // Sets a shape on the widget. Passing a NULL |shape| reverts the widget to
+  // be rectangular. Takes ownership of |shape|.
   void SetShape(gfx::NativeRegion shape);
 
   // Hides the widget then closes it after a return to the message loop.