[DevTools] Swallow mouse up in inspect mode

third_party/WebKit/Source/web/InspectorOverlay.cpp

Index: third_party/WebKit/Source/web/InspectorOverlay.cpp
diff --git a/third_party/WebKit/Source/web/InspectorOverlay.cpp b/third_party/WebKit/Source/web/InspectorOverlay.cpp
index 3954ddced19d0a5f26d46eb7fbc5dd90bdb74a64..412f7c3460848192a9cdbef63683675daefed857 100644
--- a/third_party/WebKit/Source/web/InspectorOverlay.cpp
+++ b/third_party/WebKit/Source/web/InspectorOverlay.cpp
@@ -193,6 +193,7 @@ InspectorOverlay::InspectorOverlay(WebLocalFrameImpl* frame_impl)
       show_reloading_blanket_(false),
       in_layout_(false),
       needs_update_(false),
+      swallow_next_mouse_up_(false),
       inspect_mode_(InspectorDOMAgent::kNotSearching) {}
 
 InspectorOverlay::~InspectorOverlay() {
@@ -263,7 +264,9 @@ bool InspectorOverlay::HandleInputEvent(const WebInputEvent& input_event) {
     if (mouse_event.GetType() == WebInputEvent::kMouseMove)
       handled = HandleMouseMove(mouse_event);
     else if (mouse_event.GetType() == WebInputEvent::kMouseDown)
-      handled = HandleMousePress();
+      handled = HandleMouseDown();
+    else if (mouse_event.GetType() == WebInputEvent::kMouseUp)
+      handled = HandleMouseUp();
 
     if (handled)
       return true;
@@ -766,11 +769,13 @@ bool InspectorOverlay::HandleMouseMove(const WebMouseEvent& event) {
   return true;
 }
 
-bool InspectorOverlay::HandleMousePress() {
+bool InspectorOverlay::HandleMouseDown() {
+  swallow_next_mouse_up_ = false;
   if (!ShouldSearchForNode())
     return false;
 
   if (hovered_node_for_inspect_mode_) {
+    swallow_next_mouse_up_ = true;
     Inspect(hovered_node_for_inspect_mode_.Get());
     hovered_node_for_inspect_mode_.Clear();
     return true;
@@ -778,6 +783,14 @@ bool InspectorOverlay::HandleMousePress() {
   return false;
 }
 
+bool InspectorOverlay::HandleMouseUp() {
+  if (swallow_next_mouse_up_) {
+    swallow_next_mouse_up_ = false;
+    return true;
+  }
+  return false;
+}
+
 bool InspectorOverlay::HandleGestureEvent(const WebGestureEvent& event) {
   if (!ShouldSearchForNode() || event.GetType() != WebInputEvent::kGestureTap)
     return false;