[android_webview] Fix crash in ContentViewCore/ContentSettings.

content/public/android/java/src/org/chromium/content/browser/ContentSettings.java

Index: content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java b/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
index 3ccf1f1a48eb6872c6b372967cf0870402ba49d7..2e70e558f5b5a056d5a624cd67016952b4c2bfc5 100644
--- a/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
+++ b/content/public/android/java/src/org/chromium/content/browser/ContentSettings.java
@@ -111,10 +111,14 @@ public class ContentSettings {
                                     }
                                     break;
                                 case UPDATE_UA:
-                                    mContentViewCore.setAllUserAgentOverridesInHistory();
+                                    if (mContentViewCore.isAlive()) {

[bulach, 2012/12/03 20:05:12]

how about move this check to ContentViewCore itself? seems it'd be better than
call two methods at it..

+                                        mContentViewCore.setAllUserAgentOverridesInHistory();
+                                    }
                                     break;
                                 case UPDATE_MULTI_TOUCH:
-                                    mContentViewCore.updateMultiTouchZoomSupport();
+                                    if (mContentViewCore.isAlive()) {
+                                        mContentViewCore.updateMultiTouchZoomSupport();
+                                    }
                                     break;
                             }
                         }