[DevTools] Notify embedder about pausing/resuming in debugger.

Source/web/WebDevToolsAgentImpl.cpp

Index: Source/web/WebDevToolsAgentImpl.cpp
diff --git a/Source/web/WebDevToolsAgentImpl.cpp b/Source/web/WebDevToolsAgentImpl.cpp
index bd349235e2251d93843f49793eed8a45e88cbc4d..83c2b9c78992e2bd5213d44cdf212be3483046f7 100644
--- a/Source/web/WebDevToolsAgentImpl.cpp
+++ b/Source/web/WebDevToolsAgentImpl.cpp
@@ -136,6 +136,8 @@ private:
             views.append(view);
             view->setIgnoreInputEvents(true);
         }
+        // Notify embedder about pausing.
+        agent->client()->willEnterDebugLoop();
 
         // 2. Disable active objects
         WebView::willEnterModalLoop();
@@ -153,6 +155,7 @@ private:
                 (*it)->setIgnoreInputEvents(false);
             }
         }
+        agent->client()->didExitDebugLoop();
 
         // 6. All views have been resumed, clear the set.
         m_frozenViews.clear();