webkit_support: Add CreateDevToolsMessageLoop(), which is a helper

function for WebDevToolsAgentClient::createClientMessageLoop().

The implementation is identical with r50233.
http://src.chromium.org/viewvc/chrome/trunk/src/webkit/tools/test_shell/test_shell_devtools_agent.cc?view=diff&r1=50232&r2=50233

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/3162044

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@57605 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 25 insertions, 0 deletions

diff --git a/webkit/support/webkit_support.cc b/webkit/support/webkit_support.cc
index 8199678..20dcb06 100644
--- a/webkit/support/webkit_support.cc
+++ b/webkit/support/webkit_support.cc
@@ -47,6 +47,7 @@
 #include "webkit/tools/test_shell/simple_resource_loader_bridge.h"
 
 using WebKit::WebCString;
+using WebKit::WebDevToolsAgentClient;
 using WebKit::WebFrame;
 using WebKit::WebMediaPlayerClient;
 using WebKit::WebPlugin;
@@ -160,6 +161,26 @@ FilePath GetWebKitRootDirFilePath() {
   }
 }
 
+class WebKitClientMessageLoopImpl
+    : public WebDevToolsAgentClient::WebKitClientMessageLoop {
+ public:
+  WebKitClientMessageLoopImpl() : message_loop_(MessageLoop::current()) {}
+  virtual ~WebKitClientMessageLoopImpl() {
+    message_loop_ = NULL;
+  }
+  virtual void run() {
+    bool old_state = message_loop_->NestableTasksAllowed();
+    message_loop_->SetNestableTasksAllowed(true);
+    message_loop_->Run();
+    message_loop_->SetNestableTasksAllowed(old_state);
+  }
+  virtual void quitNow() {
+    message_loop_->QuitNow();
+  }
+ private:
+  MessageLoop* message_loop_;
+};
+
 }  // namespace
 
 namespace webkit_support {
@@ -329,6 +350,10 @@ void DispatchMessageLoop() {
   current->SetNestableTasksAllowed(old_state);
 }
 
+WebDevToolsAgentClient::WebKitClientMessageLoop* CreateDevToolsMessageLoop() {
+  return new WebKitClientMessageLoopImpl();
+}
+
 void PostTaskFromHere(Task* task) {
   MessageLoop::current()->PostTask(FROM_HERE, task);
 }