Increase max saved frames on high-end Android devices

content/browser/renderer_host/renderer_frame_manager.cc

 // Copyright 2013 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 "content/browser/renderer_host/renderer_frame_manager.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 85 matching lines @@
 }
 
 RendererFrameManager::RendererFrameManager()
     : memory_pressure_listener_(
         base::Bind(&RendererFrameManager::OnMemoryPressure,
                    base::Unretained(this))) {
   // Note: With the destruction of this class the |memory_pressure_listener_|
   // gets destroyed and the observer will remove itself.
   max_number_of_saved_frames_ =
 #if defined(OS_ANDROID)
-      1;
+      // If the amount of memory on the device is >= 3.5 GB, save up to 5
+      // frames.
+      base::SysInfo::AmountOfPhysicalMemoryMB() < 1024 * 3.5f ? 1 : 5;
 #else
       std::min(5, 2 + (base::SysInfo::AmountOfPhysicalMemoryMB() / 256));
 #endif
   max_handles_ = base::SharedMemory::GetHandleLimit() / 8.0f;
 }
 
 RendererFrameManager::~RendererFrameManager() {}
 
 void RendererFrameManager::CullUnlockedFrames(size_t saved_frame_limit) {
   if (unlocked_frames_.size() + locked_frames_.size() > 0) {
@@ skipping 29 matching lines @@
       percentage = kCriticalPressurePercentage;
       break;
     case base::MemoryPressureListener::MEMORY_PRESSURE_LEVEL_NONE:
       // No need to change anything when there is no pressure.
       return;
   }
   CullUnlockedFrames(std::max(1, (saved_frame_limit * percentage) / 100));
 }
 
 }  // namespace content