Move responsiblity of tab suspending from renderer to TabManager

chrome/browser/chrome_browser_main.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 "chrome/browser/chrome_browser_main.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <set>
@@ skipping 1232 matching lines @@
         syzyasan_enable_deferred_free();
         success = true;
       }
     }
     UMA_HISTOGRAM_BOOLEAN("Syzyasan.DeferredFreeWasEnabled", success);
   }
 #endif
 
 // Start the tab manager here so that we give the most amount of time for the
 // other services to start up before we start adjusting the oom priority.
-#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS)
+#if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_CHROMEOS) || defined(OS_ANDROID)
   g_browser_process->GetTabManager()->Start();

[Georges Khalil, 2016/04/19 13:55:19]

This will also enable automatic discarding as it will subscribe to memory
pressure events. Which we don't want on Android.

Wrap the memory pressure stuff in Start with !defined(OS_ANDROID), that should
do it for now. Eventually, Start would need to be factored out into smaller
functions.

 #endif
 }
 
 void ChromeBrowserMainParts::PostBrowserStart() {
   TRACE_EVENT0("startup", "ChromeBrowserMainParts::PostBrowserStart");
   for (size_t i = 0; i < chrome_extra_parts_.size(); ++i)
     chrome_extra_parts_[i]->PostBrowserStart();
 #if !defined(OS_ANDROID)
   // Allow ProcessSingleton to process messages.
   process_singleton_->Unlock();
@@ skipping 682 matching lines @@
   chromeos::CrosSettings::Shutdown();
 #endif  // defined(OS_CHROMEOS)
 #endif  // defined(OS_ANDROID)
 }
 
 // Public members:
 
 void ChromeBrowserMainParts::AddParts(ChromeBrowserMainExtraParts* parts) {
   chrome_extra_parts_.push_back(parts);
 }