Increase the memory limit to 512 MB per renderer from 256 MB

content/common/gpu/gpu_memory_manager.cc

Index: content/common/gpu/gpu_memory_manager.cc
diff --git a/content/common/gpu/gpu_memory_manager.cc b/content/common/gpu/gpu_memory_manager.cc
index 045210aa8951b8ad3185ff6fc1f9708c29a0a8b1..b3c98c02168cebb5dfdb310b160524f94b69f53a 100644
--- a/content/common/gpu/gpu_memory_manager.cc
+++ b/content/common/gpu/gpu_memory_manager.cc
@@ -106,7 +106,7 @@ void GpuMemoryManager::UpdateAvailableGpuMemory() {
 #else
   // Ignore what the system said and give all clients the same maximum
   // allocation on desktop platforms.
-  client_hard_limit_bytes_ = 256 * 1024 * 1024;
+  client_hard_limit_bytes_ = 512 * 1024 * 1024;
 #endif
 }