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

gpu/command_buffer/service/shader_translator.h

Index: gpu/command_buffer/service/shader_translator.h
diff --git a/gpu/command_buffer/service/shader_translator.h b/gpu/command_buffer/service/shader_translator.h
index f82343e6657bb323f1565df9209b90c67f03dc19..be5b1f6a6389715cc35b4b5e26228a4c130989f1 100644
--- a/gpu/command_buffer/service/shader_translator.h
+++ b/gpu/command_buffer/service/shader_translator.h
@@ -43,6 +43,12 @@ class ShaderTranslatorInterface {
           size(_size),
           name(_name) {
     }
+    bool operator==(
+        const ShaderTranslatorInterface::VariableInfo& other) const {
+      return type == other.type &&
+          size == other.size &&
+          strcmp(name.c_str(), other.name.c_str()) == 0;
+    }
 
     int type;
     int size;