CC: Fix overlow in multiply.

cc/trees/layer_tree_host_impl.cc

 // Copyright 2011 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/trees/layer_tree_host_impl.h"
 
 #include <algorithm>
 #include <limits>
 
 #include "base/basictypes.h"
@@ skipping 1156 matching lines @@
     return;
 
   // TODO(reveman): We should avoid keeping around unused resources if
   // possible. crbug.com/224475
   global_tile_state_.hard_memory_limit_in_bytes = 0;
   global_tile_state_.soft_memory_limit_in_bytes = 0;
   if (visible_ && policy.bytes_limit_when_visible > 0) {
     global_tile_state_.hard_memory_limit_in_bytes =
         policy.bytes_limit_when_visible;
     global_tile_state_.soft_memory_limit_in_bytes =
-        global_tile_state_.hard_memory_limit_in_bytes *
-        settings_.max_memory_for_prepaint_percentage / 100;
+        (static_cast<int64>(global_tile_state_.hard_memory_limit_in_bytes) *
+         settings_.max_memory_for_prepaint_percentage) /
+        100;
   }
   // Unused limit is calculated from soft-limit, as hard-limit may
   // be very high and shouldn't typically be exceeded.
   global_tile_state_.unused_memory_limit_in_bytes = static_cast<size_t>(
       (static_cast<int64>(global_tile_state_.soft_memory_limit_in_bytes) *
        settings_.max_unused_resource_memory_percentage) /
       100);
   global_tile_state_.memory_limit_policy =
       ManagedMemoryPolicy::PriorityCutoffToTileMemoryLimitPolicy(
           visible_ ?
@@ skipping 1810 matching lines @@
   swap_promise_monitor_.erase(monitor);
 }
 
 void LayerTreeHostImpl::NotifySwapPromiseMonitorsOfSetNeedsRedraw() {
   std::set<SwapPromiseMonitor*>::iterator it = swap_promise_monitor_.begin();
   for (; it != swap_promise_monitor_.end(); it++)
     (*it)->OnSetNeedsRedrawOnImpl();
 }
 
 }  // namespace cc