gpu in-memory program cache implementation with a memory limit + lru eviction.

gpu/command_buffer/service/context_group.cc

Index: gpu/command_buffer/service/context_group.cc
diff --git a/gpu/command_buffer/service/context_group.cc b/gpu/command_buffer/service/context_group.cc
index f4f16c3e6b8e24a2774b6661e562eee4b5bdf572..a1ec47c17666b51955f7df1da548826dc4fa1d09 100644
--- a/gpu/command_buffer/service/context_group.cc
+++ b/gpu/command_buffer/service/context_group.cc
@@ -4,6 +4,7 @@
 
 #include "gpu/command_buffer/service/context_group.h"
 
+#include <algorithm>
 #include <string>
 
 #include "base/command_line.h"
@@ -39,6 +40,7 @@ ContextGroup::ContextGroup(
       max_fragment_uniform_vectors_(0u),
       max_varying_vectors_(0u),
       max_vertex_uniform_vectors_(0u),
+      program_cache_(NULL),
       feature_info_(new FeatureInfo()) {
   {
     TransferBufferManager* manager = new TransferBufferManager();
@@ -93,7 +95,7 @@ bool ContextGroup::Initialize(const DisallowedFeatures& disallowed_features,
   renderbuffer_manager_.reset(new RenderbufferManager(
       max_renderbuffer_size, max_samples));
   shader_manager_.reset(new ShaderManager());
-  program_manager_.reset(new ProgramManager());
+  program_manager_.reset(new ProgramManager(program_cache_));
 
   // Lookup GL things we need to know.
   const GLint kGLES2RequiredMinimumVertexAttribs = 8u;