Add DCHECK for shared_timer_suspended_ which shouldn't be negative

content/browser/android/content_view_statics.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <jni.h>
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 25 matching lines @@
 // Note that this vector is only accessed from the UI thread.
 base::LazyInstance<std::vector<int /* process id */> > g_suspended_processes =
     LAZY_INSTANCE_INITIALIZER;
 
 // Suspends timers in all current render processes.
 void SuspendWebKitSharedTimers(std::vector<int>* suspended_processes) {
   for (content::RenderProcessHost::iterator i(
           content::RenderProcessHost::AllHostsIterator());
        !i.IsAtEnd(); i.Advance()) {
     content::RenderProcessHost* host = i.GetCurrentValue();
-    suspended_processes->push_back(host->GetID());
-    host->Send(new ViewMsg_SetWebKitSharedTimersSuspended(true));
+    if (host && host->HasConnection()) {
+      suspended_processes->push_back(host->GetID());
+      host->Send(new ViewMsg_SetWebKitSharedTimersSuspended(true));
+    }
   }
 }
 
 // Resumes timers in processes that were previously stopped.
 void ResumeWebkitSharedTimers(const std::vector<int>& suspended_processes) {
   for (std::vector<int>::const_iterator it = suspended_processes.begin();
        it != suspended_processes.end(); ++it) {
     content::RenderProcessHost* host = content::RenderProcessHost::FromID(*it);
-    if (host)  // The process might have been killed since it was suspended.
+    if (host && host->HasConnection())  // The process might have been killed since it was suspended.
       host->Send(new ViewMsg_SetWebKitSharedTimersSuspended(false));
   }
 }
 
 }  // namespace
 
 // Returns the first substring consisting of the address of a physical location.
 static jstring FindAddress(JNIEnv* env, jclass clazz, jstring addr) {
   base::string16 content_16 = ConvertJavaStringToUTF16(env, addr);
   base::string16 result_16;
@@ skipping 15 matching lines @@
   }
 }
 
 namespace content {
 
 bool RegisterWebViewStatics(JNIEnv* env) {
   return RegisterNativesImpl(env) >= 0;
 }
 
 }  // namespace content