cc: ImageDecodes: Increase the cache item count limit to 1000.

cc/tiles/software_image_decode_controller.cc

 // Copyright 2015 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 "cc/tiles/software_image_decode_controller.h"
 
 #include <stdint.h>
 
 #include <functional>
 
@@ skipping 12 matching lines @@
 // used to inform the caller of the amount of space available in the cache. The
 // caller can still request tasks which can cause this limit to be breached.
 const size_t kLockedMemoryLimitBytes = 128 * 1024 * 1024;
 
 // The largest single high quality image to try and process. Images above this
 // size will drop down to medium quality.
 const size_t kMaxHighQualityImageSizeBytes = 64 * 1024 * 1024;
 
 // The number of entries to keep around in the cache. This limit can be breached
 // if more items are locked. That is, locked items ignore this limit.
-const size_t kMaxItemsInCache = 100;
+const size_t kMaxItemsInCache = 1000;
 
 class AutoRemoveKeyFromTaskMap {
  public:
   AutoRemoveKeyFromTaskMap(
       std::unordered_map<SoftwareImageDecodeController::ImageKey,
                          scoped_refptr<ImageDecodeTask>,
                          SoftwareImageDecodeController::ImageKeyHash>* task_map,
       const SoftwareImageDecodeController::ImageKey& key)
       : task_map_(task_map), key_(key) {}
   ~AutoRemoveKeyFromTaskMap() { task_map_->erase(key_); }
@@ skipping 846 matching lines @@
 void SoftwareImageDecodeController::MemoryBudget::ResetUsage() {
   current_usage_bytes_ = 0;
 }
 
 size_t SoftwareImageDecodeController::MemoryBudget::GetCurrentUsageSafe()
     const {
   return current_usage_bytes_.ValueOrDie();
 }
 
 }  // namespace cc