Core - Add CefSharp.RenderProcessId javascript property

Two new properties have been added (both have the same value)
- CefSharp.RenderProcessId
- cefSharp.renderProcessId

Use which ever suites your naming style

Resolves #2984

Author: amaitland

CefSharp.BrowserSubprocess.Core/CefAppUnmanagedWrapper.cpp

@@ -41,6 +41,9 @@ namespace CefSharp
         "   return result;"
         "})();";
 
+    const CefString kRenderProcessId = CefString("RenderProcessId");
+    const CefString kRenderProcessIdCamelCase = CefString("renderProcessId");
+
     CefRefPtr<CefRenderProcessHandler> CefAppUnmanagedWrapper::GetRenderProcessHandler()
     {
         return this;
@@ -134,6 +137,7 @@ namespace CefSharp
         //TODO: Look at adding some sort of javascript mapping layer to reduce the code duplication
         auto global = context->GetGlobal();
         auto browserWrapper = FindBrowserWrapper(browser->GetIdentifier());
+        auto processId = System::Diagnostics::Process::GetCurrentProcess()->Id;
 
         //TODO: JSB: Split functions into their own classes
         //Browser wrapper is only used for BindObjectAsync
@@ -155,6 +159,7 @@ namespace CefSharp
             cefSharpObj->SetValue(kRemoveObjectFromCache, removeObjectFromCacheFunction, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
             cefSharpObj->SetValue(kIsObjectCached, isObjectCachedFunction, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
             cefSharpObj->SetValue(kPostMessage, postMessageFunction, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
+            cefSharpObj->SetValue(kRenderProcessId, CefV8Value::CreateInt(processId), CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
 
             global->SetValue(_jsBindingPropertyName, cefSharpObj, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_READONLY);
         }
@@ -167,6 +172,7 @@ namespace CefSharp
             cefSharpObjCamelCase->SetValue(kRemoveObjectFromCacheCamelCase, removeObjectFromCacheFunction, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
             cefSharpObjCamelCase->SetValue(kIsObjectCachedCamelCase, isObjectCachedFunction, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
             cefSharpObjCamelCase->SetValue(kPostMessageCamelCase, postMessageFunction, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
+            cefSharpObjCamelCase->SetValue(kRenderProcessIdCamelCase, CefV8Value::CreateInt(processId), CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_NONE);
 
             global->SetValue(_jsBindingPropertyNameCamelCase, cefSharpObjCamelCase, CefV8Value::PropertyAttribute::V8_PROPERTY_ATTRIBUTE_READONLY);
         }