Update from https://crrev.com/316786

gpu/command_buffer/service/program_cache.h

Index: gpu/command_buffer/service/program_cache.h
diff --git a/gpu/command_buffer/service/program_cache.h b/gpu/command_buffer/service/program_cache.h
index 3fb5687e8b1d07e7a8212dc91f242f03b529b667..624c436016f7c834f235bfe21093618884d316bc 100644
--- a/gpu/command_buffer/service/program_cache.h
+++ b/gpu/command_buffer/service/program_cache.h
@@ -18,7 +18,6 @@ namespace gpu {
 namespace gles2 {
 
 class Shader;
-class ShaderTranslator;
 
 // Program cache base class for caching linked gpu programs
 class GPU_EXPORT ProgramCache {
@@ -41,10 +40,8 @@ class GPU_EXPORT 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
@@ -52,9 +49,7 @@ class GPU_EXPORT ProgramCache {
   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;
 
@@ -63,9 +58,7 @@ class GPU_EXPORT ProgramCache {
   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;
 
@@ -75,10 +68,8 @@ class GPU_EXPORT ProgramCache {
   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:
@@ -87,7 +78,6 @@ class GPU_EXPORT ProgramCache {
 
   // 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