[Android] Add support for a hung renderer dialog

chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
index ed6352b30a848138c7c6a2e09aed45d7f162bca8..d762fbc9d3a292ecc40e5a4ad672fc82ad50233b 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tab/Tab.java
@@ -474,6 +474,7 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
         @Override
         public void rendererUnresponsive() {
             super.rendererUnresponsive();
+            if (mNativeTabAndroid != 0) nativeOnRendererUnresponsive(mNativeTabAndroid);
             if (mFullscreenManager == null) return;
             mFullscreenHungRendererToken =
                     mFullscreenManager.showControlsPersistentAndClearOldToken(
@@ -483,6 +484,7 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
         @Override
         public void rendererResponsive() {
             super.rendererResponsive();
+            if (mNativeTabAndroid != 0) nativeOnRendererResponsive(mNativeTabAndroid);
             if (mFullscreenManager == null) return;
             mFullscreenManager.hideControlsPersistent(mFullscreenHungRendererToken);
             mFullscreenHungRendererToken = FullscreenManager.INVALID_TOKEN;
@@ -2881,6 +2883,8 @@ public class Tab implements ViewGroup.OnHierarchyChangeListener,
     private native void nativeDetachOverlayContentViewCore(long nativeTabAndroid,
             ContentViewCore content);
     private native boolean nativeHasPrerenderedUrl(long nativeTabAndroid, String url);
+    private native void nativeOnRendererUnresponsive(long nativeTabAndroid);
+    private native void nativeOnRendererResponsive(long nativeTabAndroid);
 
     private static native void nativeRecordStartupToCommitUma();
 }