Updating MvcRazorHost to use overload that generates pragma checksum

Fixes #1152

Author: pranavkm

src/Microsoft.AspNet.Mvc.Razor.Host/MvcRazorHost.cs

@@ -122,11 +122,8 @@ public virtual string ActivateAttribute
         public GeneratorResults GenerateCode(string rootRelativePath, Stream inputStream)
         {
             var className = ParserHelpers.SanitizeClassName(rootRelativePath);
-            using (var reader = new StreamReader(inputStream))
-            {
-                var engine = new RazorTemplateEngine(this);
-                return engine.GenerateCode(reader, className, DefaultNamespace, rootRelativePath);
-            }
+            var engine = new RazorTemplateEngine(this);
+            return engine.GenerateCode(inputStream, className, DefaultNamespace, rootRelativePath);
         }
 
         /// <inheritdoc />

test/Microsoft.AspNet.Mvc.Razor.Host.Test/TestFiles/Output/Runtime/Basic.cs

@@ -1,4 +1,5 @@
-namespace Asp
+#pragma checksum "TestFiles/Input/Basic.cshtml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "63d2634be31f68aa89a0c1561d67c73cc446f3d4"
+namespace Asp
 {
     using System;
     using System.Linq;

test/Microsoft.AspNet.Mvc.Razor.Host.Test/TestFiles/Output/Runtime/Inject.cs

@@ -1,4 +1,5 @@
-namespace Asp
+#pragma checksum "TestFiles/Input/Inject.cshtml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "424b7fe9f12352c59210b5fa8c74ca8c9c67de81"
+namespace Asp
 {
 #line 1 "TestFiles/Input/Inject.cshtml"
 using MyNamespace

test/Microsoft.AspNet.Mvc.Razor.Host.Test/TestFiles/Output/Runtime/InjectWithModel.cs

@@ -1,4 +1,5 @@
-namespace Asp
+#pragma checksum "TestFiles/Input/InjectWithModel.cshtml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "0c0e10d3fd8f5bf30eabc22ca0ee91355a13426d"
+namespace Asp
 {
     using System;
     using System.Linq;

test/Microsoft.AspNet.Mvc.Razor.Host.Test/TestFiles/Output/Runtime/Model.cs

@@ -1,4 +1,5 @@
-namespace Asp
+#pragma checksum "TestFiles/Input/Model.cshtml" "{ff1816ec-aa5e-4d10-87f7-6f4963833460}" "2c1e88396568d309c236020e59bf2abacfadd612"
+namespace Asp
 {
     using System;
     using System.Linq;