[Origin Trials] Install origin trial bindings on V8 context conditionally

third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp

Index: third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp
diff --git a/third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp b/third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp
index 76b1d711395d707ce69f8c40036574efeffaaaec..f0021814d0de16e7180d80a22ad8aab2adb1688e 100644
--- a/third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp
+++ b/third_party/WebKit/Source/core/testing/v8/WebCoreTestSupport.cpp
@@ -25,10 +25,14 @@
 
 #include "core/testing/v8/WebCoreTestSupport.h"
 
+#include "bindings/core/v8/DOMWrapperWorld.h"
+#include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8Internals.h"
+#include "bindings/core/v8/V8WorkerInternals.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/LocalFrame.h"
+#include "core/origin_trials/OriginTrialContext.h"
 #include "core/testing/InternalSettings.h"
 #include "core/testing/Internals.h"
 #include "core/testing/WorkerInternals.h"
@@ -37,6 +41,10 @@ using namespace blink;
 
 namespace WebCoreTestSupport {
 
+namespace {
+blink::initializeOriginTrialsFunction s_originalInitializeOriginTrialsFunction = nullptr;
+}
+
 v8::Local<v8::Value> createInternalsObject(v8::Local<v8::Context> context)
 {
     ScriptState* scriptState = ScriptState::from(context);
@@ -51,13 +59,63 @@ v8::Local<v8::Value> createInternalsObject(v8::Local<v8::Context> context)
 
 void injectInternalsObject(v8::Local<v8::Context> context)
 {
+    if (!s_originalInitializeOriginTrialsFunction) {
+        s_originalInitializeOriginTrialsFunction = setInitializeOriginTrialsFunction(initializeOriginTrialsForTests);
+    }
+
     ScriptState* scriptState = ScriptState::from(context);
     ScriptState::Scope scope(scriptState);
     v8::Local<v8::Object> global = scriptState->context()->Global();
     v8::Local<v8::Value> internals = createInternalsObject(context);
     if (internals.IsEmpty())
         return;
+
     v8CallOrCrash(global->Set(scriptState->context(), v8AtomicString(scriptState->isolate(), Internals::internalsId), internals));
+
+    // If Origin Trials have been registered before the internals object was ready,
+    // then inject them into the context now
+    ExecutionContext* executionContext = toExecutionContext(context);
+    if (executionContext) {
+        OriginTrialContext* originTrialContext = OriginTrialContext::from(executionContext);
+        if (originTrialContext)
+            originTrialContext->initializePendingTrials();
+    }
+}
+
+void initializeOriginTrialsForTests(v8::Local<v8::Context> context, const blink::DOMWrapperWorld& world)
+{
+    DCHECK(!context.IsEmpty());
+    (*s_originalInitializeOriginTrialsFunction)(context, world);
+    ExecutionContext* executionContext = toExecutionContext(context);
+    if (!executionContext->isDocument() && !executionContext->isWorkerGlobalScope())
+        return;
+    OriginTrialContext* originTrialContext = OriginTrialContext::from(executionContext, OriginTrialContext::DontCreateIfNotExists);
+    if (!originTrialContext)
+        return;
+
+    context->Enter();
+    v8::Isolate* isolate = context->GetIsolate();
+    v8::Local<v8::Object> global = context->Global();
+    // TODO(iclelland): This is a placeholder for the real interface object,
+    // which we don't try to obtain at this time. (An assertion in the bindings
+    // generation code prevents it from actually being used.) It should be
+    // replaced with the actual interface if possible, in order to allow origin
+    // trials on static attributes. (crbug.com/614352)
+    v8::Local<v8::Function> interface = v8::Function::New(context, nullptr).ToLocalChecked();
+
+    v8::Local<v8::String> internalsName = v8::String::NewFromUtf8(isolate, "internals", v8::NewStringType::kNormal).ToLocalChecked();
+    v8::Local<v8::Value> v8Internals = global->Get(context, internalsName).ToLocalChecked();
+    if (v8Internals->IsObject()) {
+        v8::Local<v8::Object> internals = v8Internals->ToObject();
+        if (originTrialContext->isFeatureEnabled("Frobulate", nullptr) && !originTrialContext->featureBindingsInstalled("Frobulate")) {
+            if (executionContext->isDocument())
+                V8Internals::installOriginTrialsSampleAPI(isolate, world, internals, interface);
+            else if (executionContext->isWorkerGlobalScope())
+                V8WorkerInternals::installOriginTrialsSampleAPI(isolate, world, internals, interface);
+            originTrialContext->setFeatureBindingsInstalled("Frobulate");
+        }
+    }
+    context->Exit();
 }
 
 void resetInternalsObject(v8::Local<v8::Context> context)