command_buffer: Implement EXT_blend_func_extended

gpu/command_buffer/service/shader_manager.h

Index: gpu/command_buffer/service/shader_manager.h
diff --git a/gpu/command_buffer/service/shader_manager.h b/gpu/command_buffer/service/shader_manager.h
index 3288bffb3bb5ed68e3b857bfc59f72a38643c7d7..186937174c3a0b26af0d454936c426f4204621e9 100644
--- a/gpu/command_buffer/service/shader_manager.h
+++ b/gpu/command_buffer/service/shader_manager.h
@@ -88,6 +88,8 @@ class GPU_EXPORT Shader : public base::RefCounted<Shader> {
   const sh::Varying* GetVaryingInfo(const std::string& name) const;
   const sh::InterfaceBlock* GetInterfaceBlockInfo(
       const std::string& name) const;
+  const sh::OutputVariable* GetOutputVariableInfo(
+      const std::string& name) const;
 
   // If the original_name is not found, return NULL.
   const std::string* GetAttribMappedName(
@@ -105,6 +107,10 @@ class GPU_EXPORT Shader : public base::RefCounted<Shader> {
   const std::string* GetInterfaceBlockMappedName(
       const std::string& original_name) const;
 
+  // If the original_name is not found, return NULL.
+  const std::string* GetOutputVariableMappedName(
+      const std::string& original_name) const;
+
   // If the hashed_name is not found, return NULL.
   const std::string* GetOriginalNameFromHashedName(
       const std::string& hashed_name) const;
@@ -144,6 +150,10 @@ class GPU_EXPORT Shader : public base::RefCounted<Shader> {
     return varying_map_;
   }
 
+  const OutputVariableList& output_variable_list() const {
+    return output_variable_list_;
+  }
+
   // Used by program cache.
   const InterfaceBlockMap& interface_block_map() const {
     return interface_block_map_;
@@ -177,6 +187,12 @@ class GPU_EXPORT Shader : public base::RefCounted<Shader> {
     uniform_map_[uniform.mappedName] = uniform;
   }
 
+  void set_output_variable_list(
+      const OutputVariableList& output_variable_list) {
+    // copied because cache might be cleared
+    output_variable_list_ = output_variable_list;
+  }
+
  private:
   friend class base::RefCounted<Shader>;
   friend class ShaderManager;
@@ -237,6 +253,7 @@ class GPU_EXPORT Shader : public base::RefCounted<Shader> {
   UniformMap uniform_map_;
   VaryingMap varying_map_;
   InterfaceBlockMap interface_block_map_;
+  OutputVariableList output_variable_list_;
 
   // The name hashing info when the shader was last compiled.
   NameMap name_map_;