DevTools: place DevTools WebContents underneath inspected WebContents.

chrome/browser/devtools/devtools_embedder_message_dispatcher.h

Index: chrome/browser/devtools/devtools_embedder_message_dispatcher.h
diff --git a/chrome/browser/devtools/devtools_embedder_message_dispatcher.h b/chrome/browser/devtools/devtools_embedder_message_dispatcher.h
index 8cf996fef52925e0f91c208cc789c0899b7994c0..a80d9459e969e91be994069da1a3df0f66913380 100644
--- a/chrome/browser/devtools/devtools_embedder_message_dispatcher.h
+++ b/chrome/browser/devtools/devtools_embedder_message_dispatcher.h
@@ -28,7 +28,8 @@ class DevToolsEmbedderMessageDispatcher {
 
     virtual void ActivateWindow() = 0;
     virtual void CloseWindow() = 0;
-    virtual void SetWindowBounds(int x, int y, int width, int height) = 0;
+    virtual void SetContentsInsets(
+        int top, int left, int bottom, int right) = 0;
     virtual void MoveWindow(int x, int y) = 0;
     virtual void SetDockSide(const std::string& side) = 0;
     virtual void OpenInNewTab(const std::string& url) = 0;