DevTools: create test infrastructure so devtools drives the test

content/shell/browser/shell_devtools_bindings.cc

Index: content/shell/browser/shell_devtools_bindings.cc
diff --git a/content/shell/browser/shell_devtools_bindings.cc b/content/shell/browser/shell_devtools_bindings.cc
index 77bfc75a95bed31056a00181e54bd7013ddced47..88ab2042f0cf1b8246b6314a5eba94ed3d6b7943 100644
--- a/content/shell/browser/shell_devtools_bindings.cc
+++ b/content/shell/browser/shell_devtools_bindings.cc
@@ -15,6 +15,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "content/public/browser/browser_thread.h"
+#include "content/public/browser/navigation_handle.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/storage_partition.h"
@@ -128,19 +129,20 @@ ShellDevToolsBindings::~ShellDevToolsBindings() {
     agent_host_->DetachClient(this);
 }
 
-void ShellDevToolsBindings::RenderViewCreated(
-    RenderViewHost* render_view_host) {
-  CreateFrontendHost();
+void ShellDevToolsBindings::ReadyToCommitNavigation(
+    content::NavigationHandle* navigation_handle) {
+  if (navigation_handle->IsInMainFrame()) {
+    CreateFrontendHost(navigation_handle->GetRenderFrameHost());
+  }
 }
 
 #if !defined(OS_ANDROID)
-void ShellDevToolsBindings::CreateFrontendHost() {
-  if (!frontend_host_) {
-    frontend_host_.reset(DevToolsFrontendHost::Create(
-        web_contents()->GetMainFrame(),
-        base::Bind(&ShellDevToolsBindings::HandleMessageFromDevToolsFrontend,
-                   base::Unretained(this))));
-  }
+void ShellDevToolsBindings::CreateFrontendHost(
+    RenderFrameHost* render_frame_host) {
+  frontend_host_.reset(DevToolsFrontendHost::Create(
+      render_frame_host,
+      base::Bind(&ShellDevToolsBindings::HandleMessageFromDevToolsFrontend,
+                 base::Unretained(this))));
 }
 #endif