Remove about:srcdoc url conversion.

content/public/android/java/src/org/chromium/content_public/browser/WebContentsObserver.java

Index: content/public/android/java/src/org/chromium/content_public/browser/WebContentsObserver.java
diff --git a/content/public/android/java/src/org/chromium/content_public/browser/WebContentsObserver.java b/content/public/android/java/src/org/chromium/content_public/browser/WebContentsObserver.java
index 3cb599f675f0e96d92388ac459f1b40b31d28cf3..6dc9675dfb85d8040e144574661f8e87d1bd0760 100644
--- a/content/public/android/java/src/org/chromium/content_public/browser/WebContentsObserver.java
+++ b/content/public/android/java/src/org/chromium/content_public/browser/WebContentsObserver.java
@@ -111,10 +111,9 @@ public abstract class WebContentsObserver {
      * @param isMainFrame Whether the load is happening for the main frame.
      * @param validatedUrl The validated URL that is being navigated to.
      * @param isErrorPage Whether this is navigating to an error page.
-     * @param isIframeSrcdoc Whether this is navigating to about:srcdoc.
      */
     public void didStartProvisionalLoadForFrame(long frameId, long parentFrameId,
-            boolean isMainFrame, String validatedUrl, boolean isErrorPage, boolean isIframeSrcdoc) {
+            boolean isMainFrame, String validatedUrl, boolean isErrorPage) {
     }
 
     /**