Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/csharp/src/Google.Protobuf/Google.Protobuf.nuspec

Index: third_party/protobuf/csharp/src/Google.Protobuf/Google.Protobuf.nuspec
diff --git a/third_party/protobuf/csharp/src/Google.Protobuf/Google.Protobuf.nuspec b/third_party/protobuf/csharp/src/Google.Protobuf/Google.Protobuf.nuspec
index 2f691e3c3d51dd626eda1a21b26dd917f799504f..90e3da3d0e5c09ebaa4a65948dcd56264238099a 100644
--- a/third_party/protobuf/csharp/src/Google.Protobuf/Google.Protobuf.nuspec
+++ b/third_party/protobuf/csharp/src/Google.Protobuf/Google.Protobuf.nuspec
@@ -5,7 +5,7 @@
     <title>Google Protocol Buffers C#</title>
     <summary>C# runtime library for Protocol Buffers - Google's data interchange format.</summary>
     <description>See project site for more info.</description>
-    <version>3.0.0-beta2</version>
+    <version>3.0.0-beta3</version>
     <authors>Google Inc.</authors>
     <owners>protobuf-packages</owners>
     <licenseUrl>https://github.com/google/protobuf/blob/master/LICENSE</licenseUrl>
@@ -15,6 +15,15 @@
     <copyright>Copyright 2015, Google Inc.</copyright>
     <tags>Protocol Buffers Binary Serialization Format Google proto proto3</tags>
     <dependencies>
+      <!-- Dependencies for older, monolithic-assembly platforms -->
+      <group targetFramework="net45" />
+      <group targetFramework="wp8" />
+      <group targetFramework="win8" />
+      <group targetFramework="wpa81" />
+      <group targetFramework="xamarin.ios" />
+      <group targetFramework="monotouch" />
+      <group targetFramework="monoandroid" />
+      <!-- Dependencies for newer, more granular platforms (.NET Core etc) -->
       <group targetFramework="dotnet">
         <dependency id="System.Collections" version="4.0.0" />
         <dependency id="System.Diagnostics.Debug" version="4.0.0" />
@@ -24,10 +33,12 @@
         <dependency id="System.Linq.Expressions" version="4.0.0" />
         <dependency id="System.ObjectModel" version="4.0.0" />
         <dependency id="System.Reflection" version="4.0.0" />
+        <dependency id="System.Reflection.Extensions" version="4.0.0" />
         <dependency id="System.Runtime" version="4.0.0" />
         <dependency id="System.Runtime.Extensions" version="4.0.0" />
         <dependency id="System.Text.Encoding" version="4.0.0" />
         <dependency id="System.Text.RegularExpressions" version="4.0.0" />
+        <dependency id="System.Threading" version="4.0.0" />
       </group>
     </dependencies>
   </metadata>
@@ -39,18 +50,5 @@
     <file src="bin/ReleaseSigned/Google.Protobuf.pdb" target="lib/dotnet" />
     <file src="bin/ReleaseSigned/Google.Protobuf.xml" target="lib/dotnet" />
     <file src="**\*.cs" target="src" />
-    <file src="..\..\..\cmake\Release\protoc.exe" target="tools" />
-    <file src="..\..\..\src\google\protobuf\any.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\api.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\descriptor.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\duration.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\empty.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\field_mask.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\source_context.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\struct.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\timestamp.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\any.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\type.proto" target="tools\google\protobuf" />
-    <file src="..\..\..\src\google\protobuf\wrappers.proto" target="tools\google\protobuf" />
   </files>
-</package>
+</package>