Update from https://crrev.com/316786

gpu/command_buffer/service/program_cache.h

 // Copyright (c) 2012 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_PROGRAM_CACHE_H_
 #define GPU_COMMAND_BUFFER_SERVICE_PROGRAM_CACHE_H_
 
 #include <map>
 #include <string>
 
 #include "base/containers/hash_tables.h"
 #include "base/sha1.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/command_buffer/service/shader_manager.h"
 
 namespace gpu {
 namespace gles2 {
 
 class Shader;
-class ShaderTranslator;
 
 // Program cache base class for caching linked gpu programs
 class GPU_EXPORT ProgramCache {
  public:
   static const size_t kHashLength = base::kSHA1Length;
 
   typedef std::map<std::string, GLint> LocationMap;
 
   enum LinkedProgramStatus {
     LINK_UNKNOWN,
     LINK_SUCCEEDED
   };
 
   enum ProgramLoadResult {
     PROGRAM_LOAD_FAILURE,
     PROGRAM_LOAD_SUCCESS
   };
 
   ProgramCache();
   virtual ~ProgramCache();
 
   LinkedProgramStatus GetLinkedProgramStatus(
-      const std::string& untranslated_shader_a,
-      const ShaderTranslatorInterface* translator_a,
-      const std::string& untranslated_shader_b,
-      const ShaderTranslatorInterface* translator_b,
+      const std::string& shader_signature_a,
+      const std::string& shader_signature_b,
       const LocationMap* bind_attrib_location_map) const;
 
   // Loads the linked program from the cache.  If the program is not found or
   // there was an error, PROGRAM_LOAD_FAILURE should be returned.
   virtual ProgramLoadResult LoadLinkedProgram(
       GLuint program,
       Shader* shader_a,
-      const ShaderTranslatorInterface* translator_a,
       Shader* shader_b,
-      const ShaderTranslatorInterface* translator_b,
       const LocationMap* bind_attrib_location_map,
       const ShaderCacheCallback& shader_callback) = 0;
 
   // Saves the program into the cache.  If successful, the implementation should
   // call LinkedProgramCacheSuccess.
   virtual void SaveLinkedProgram(
       GLuint program,
       const Shader* shader_a,
-      const ShaderTranslatorInterface* translator_a,
       const Shader* shader_b,
-      const ShaderTranslatorInterface* translator_b,
       const LocationMap* bind_attrib_location_map,
       const ShaderCacheCallback& shader_callback) = 0;
 
   virtual void LoadProgram(const std::string& program) = 0;
 
   // clears the cache
   void Clear();
 
   // Only for testing
-  void LinkedProgramCacheSuccess(const std::string& shader_a,
-                                 const ShaderTranslatorInterface* translator_a,
-                                 const std::string& shader_b,
-                                 const ShaderTranslatorInterface* translator_b,
+  void LinkedProgramCacheSuccess(const std::string& shader_signature_a,
+                                 const std::string& shader_signature_b,
                                  const LocationMap* bind_attrib_location_map);
 
  protected:
   // called by implementing class after a shader was successfully cached
   void LinkedProgramCacheSuccess(const std::string& program_hash);
 
   // result is not null terminated
   void ComputeShaderHash(const std::string& shader,
-                         const ShaderTranslatorInterface* translator,
                          char* result) const;
 
   // result is not null terminated.  hashed shaders are expected to be
   // kHashLength in length
   void ComputeProgramHash(
       const char* hashed_shader_0,
       const char* hashed_shader_1,
       const LocationMap* bind_attrib_location_map,
       char* result) const;
 
   void Evict(const std::string& program_hash);
 
  private:
   typedef base::hash_map<std::string,
                          LinkedProgramStatus> LinkStatusMap;
 
   // called to clear the backend cache
   virtual void ClearBackend() = 0;
 
   LinkStatusMap link_status_;
 
   DISALLOW_COPY_AND_ASSIGN(ProgramCache);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_PROGRAM_CACHE_H_