Lazy load chrome.* APIs

chrome/renderer/extensions/dispatcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/renderer/extensions/dispatcher.h"
 
 #include "base/callback.h"
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/string_piece.h"
+#include "base/string_split.h"
 #include "chrome/common/child_process_logging.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/extensions/api/extension_api.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_messages.h"
+#include "chrome/common/extensions/features/feature.h"
 #include "chrome/common/extensions/manifest.h"
 #include "chrome/common/extensions/permissions/permission_set.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/common/view_type.h"
 #include "chrome/renderer/chrome_render_process_observer.h"
 #include "chrome/renderer/extensions/api_definitions_natives.h"
 #include "chrome/renderer/extensions/app_bindings.h"
 #include "chrome/renderer/extensions/app_runtime_custom_bindings.h"
 #include "chrome/renderer/extensions/app_window_custom_bindings.h"
+#include "chrome/renderer/extensions/binding_generating_native_handler.h"
 #include "chrome/renderer/extensions/chrome_v8_context.h"
 #include "chrome/renderer/extensions/chrome_v8_extension.h"
 #include "chrome/renderer/extensions/content_watcher.h"
 #include "chrome/renderer/extensions/context_menus_custom_bindings.h"
 #include "chrome/renderer/extensions/event_bindings.h"
 #include "chrome/renderer/extensions/extension_custom_bindings.h"
 #include "chrome/renderer/extensions/extension_groups.h"
 #include "chrome/renderer/extensions/extension_helper.h"
 #include "chrome/renderer/extensions/file_browser_handler_custom_bindings.h"
 #include "chrome/renderer/extensions/file_browser_private_custom_bindings.h"
 #include "chrome/renderer/extensions/file_system_natives.h"
 #include "chrome/renderer/extensions/i18n_custom_bindings.h"
 #include "chrome/renderer/extensions/media_galleries_custom_bindings.h"
 #include "chrome/renderer/extensions/miscellaneous_bindings.h"
 #include "chrome/renderer/extensions/module_system.h"
-#include "chrome/renderer/extensions/native_handler.h"
+#include "chrome/renderer/extensions/object_backed_native_handler.h"
 #include "chrome/renderer/extensions/page_actions_custom_bindings.h"
 #include "chrome/renderer/extensions/page_capture_custom_bindings.h"
 #include "chrome/renderer/extensions/request_sender.h"
 #include "chrome/renderer/extensions/runtime_custom_bindings.h"
 #include "chrome/renderer/extensions/send_request_natives.h"
 #include "chrome/renderer/extensions/set_icon_natives.h"
 #include "chrome/renderer/extensions/sync_file_system_custom_bindings.h"
 #include "chrome/renderer/extensions/tab_finder.h"
 #include "chrome/renderer/extensions/tabs_custom_bindings.h"
 #include "chrome/renderer/extensions/tts_custom_bindings.h"
@@ skipping 30 matching lines @@
 namespace extensions {
 
 namespace {
 
 static const int64 kInitialExtensionIdleHandlerDelayMs = 5*1000;
 static const int64 kMaxExtensionIdleHandlerDelayMs = 5*60*1000;
 static const char kEventDispatchFunction[] = "Event.dispatchEvent";
 static const char kOnSuspendEvent[] = "runtime.onSuspend";
 static const char kOnSuspendCanceledEvent[] = "runtime.onSuspendCanceled";
 
-class ChromeHiddenNativeHandler : public NativeHandler {
+static v8::Handle<v8::Object> GetOrCreateChrome(
+    v8::Handle<v8::Context> context) {
+  v8::Handle<v8::String> chrome_string(v8::String::New("chrome"));
+  v8::Handle<v8::Object> global(context->Global());
+  v8::Handle<v8::Value> chrome(global->Get(chrome_string));
+  if (chrome.IsEmpty() || chrome->IsUndefined()) {
+    v8::Handle<v8::Object> chrome_object(v8::Object::New());
+    global->Set(chrome_string, chrome_object);
+    return chrome_object;
+  }
+  CHECK(chrome->IsObject());
+  return chrome->ToObject();
+}
+
+class SchemaRegistryNativeHandler : public ObjectBackedNativeHandler {
  public:
-  explicit ChromeHiddenNativeHandler(v8::Isolate* isolate)
-      : NativeHandler(isolate) {
+  SchemaRegistryNativeHandler(V8SchemaRegistry* registry,
+                              v8::Handle<v8::Context> context)
+      : ObjectBackedNativeHandler(context),
+        registry_(registry) {
+    RouteFunction("GetSchema",
+        base::Bind(&SchemaRegistryNativeHandler::GetSchema,
+                   base::Unretained(this)));
+  }
+
+ private:
+  v8::Handle<v8::Value> GetSchema(const v8::Arguments& args) {
+    return registry_->GetSchema(*v8::String::AsciiValue(args[0]));
+  }
+
+  V8SchemaRegistry* registry_;
+};
+
+class V8ContextNativeHandler : public ObjectBackedNativeHandler {
+ public:
+  explicit V8ContextNativeHandler(ChromeV8Context* context)
+      : ObjectBackedNativeHandler(context->v8_context()),
+        context_(context) {
+    RouteFunction("GetAvailability",
+        base::Bind(&V8ContextNativeHandler::GetAvailability,
+                   base::Unretained(this)));
+  }
+
+ private:
+  v8::Handle<v8::Value> GetAvailability(const v8::Arguments& args) {
+    CHECK_EQ(args.Length(), 1);
+    std::string api_name = *v8::String::AsciiValue(args[0]->ToString());
+    Feature::Availability availability = context_->GetAvailability(api_name);
+
+    v8::Handle<v8::Object> ret = v8::Object::New();
+    ret->Set(v8::String::New("is_available"),
+             v8::Boolean::New(availability.is_available()));
+    ret->Set(v8::String::New("message"),
+             v8::String::New(availability.message().c_str()));
+    return ret;
+  }
+
+  ChromeV8Context* context_;
+};
+
+class ChromeHiddenNativeHandler : public ObjectBackedNativeHandler {
+ public:
+  explicit ChromeHiddenNativeHandler(v8::Handle<v8::Context> context)
+      : ObjectBackedNativeHandler(context) {
     RouteFunction("GetChromeHidden",
         base::Bind(&ChromeHiddenNativeHandler::GetChromeHidden,
                    base::Unretained(this)));
   }
 
   v8::Handle<v8::Value> GetChromeHidden(const v8::Arguments& args) {
-    return ChromeV8Context::GetOrCreateChromeHidden(v8::Context::GetCurrent());
+    return ChromeV8Context::GetOrCreateChromeHidden(v8_context());
   }
 };
 
-class PrintNativeHandler : public NativeHandler {
+class ChromeNativeHandler : public ObjectBackedNativeHandler {
  public:
-  explicit PrintNativeHandler(v8::Isolate* isolate)
-      : NativeHandler(isolate) {
+  explicit ChromeNativeHandler(v8::Handle<v8::Context> context)
+      : ObjectBackedNativeHandler(context) {
+    RouteFunction("GetChrome",
+        base::Bind(&ChromeNativeHandler::GetChrome, base::Unretained(this)));
+  }
+
+  v8::Handle<v8::Value> GetChrome(const v8::Arguments& args) {
+    return GetOrCreateChrome(v8_context());
+  }
+};
+
+class PrintNativeHandler : public ObjectBackedNativeHandler {
+ public:
+  explicit PrintNativeHandler(v8::Handle<v8::Context> context)
+      : ObjectBackedNativeHandler(context) {
     RouteFunction("Print",
         base::Bind(&PrintNativeHandler::Print,
                    base::Unretained(this)));
   }
 
   v8::Handle<v8::Value> Print(const v8::Arguments& args) {
     if (args.Length() < 1)
       return v8::Undefined();
 
     std::vector<std::string> components;
@@ skipping 11 matching lines @@
       : ChromeV8Extension(dispatcher) {
     RouteFunction("IncrementKeepaliveCount",
         base::Bind(&LazyBackgroundPageNativeHandler::IncrementKeepaliveCount,
                    base::Unretained(this)));
     RouteFunction("DecrementKeepaliveCount",
         base::Bind(&LazyBackgroundPageNativeHandler::DecrementKeepaliveCount,
                    base::Unretained(this)));
   }
 
   v8::Handle<v8::Value> IncrementKeepaliveCount(const v8::Arguments& args) {
-    ChromeV8Context* context = dispatcher()->v8_context_set().GetCurrent();
+    ChromeV8Context* context =
+        dispatcher()->v8_context_set().GetByV8Context(v8_context());
     if (!context)
       return v8::Undefined();
     RenderView* render_view = context->GetRenderView();
     if (IsContextLazyBackgroundPage(render_view, context->extension())) {
       render_view->Send(new ExtensionHostMsg_IncrementLazyKeepaliveCount(
           render_view->GetRoutingID()));
     }
     return v8::Undefined();
   }
 
   v8::Handle<v8::Value> DecrementKeepaliveCount(const v8::Arguments& args) {
-    ChromeV8Context* context = dispatcher()->v8_context_set().GetCurrent();
+    ChromeV8Context* context =
+        dispatcher()->v8_context_set().GetByV8Context(v8_context());
     if (!context)
       return v8::Undefined();
     RenderView* render_view = context->GetRenderView();
     if (IsContextLazyBackgroundPage(render_view, context->extension())) {
       render_view->Send(new ExtensionHostMsg_DecrementLazyKeepaliveCount(
           render_view->GetRoutingID()));
     }
     return v8::Undefined();
   }
 
@@ skipping 67 matching lines @@
   }
 
  private:
   std::string extension_id_;
   std::string context_type_;
   bool is_incognito_context_;
   int manifest_version_;
   bool send_request_disabled_;
 };
 
-class LoggingNativeHandler : public NativeHandler {
+class LoggingNativeHandler : public ObjectBackedNativeHandler {
  public:
-  explicit LoggingNativeHandler(v8::Isolate* isolate)
-      : NativeHandler(isolate) {
+  explicit LoggingNativeHandler(v8::Handle<v8::Context> context)
+      : ObjectBackedNativeHandler(context) {
     RouteFunction("DCHECK",
-        base::Bind(&LoggingNativeHandler::Dcheck,
-                   base::Unretained(this)));
+        base::Bind(&LoggingNativeHandler::Dcheck, base::Unretained(this)));
   }
 
   v8::Handle<v8::Value> Dcheck(const v8::Arguments& args) {
     CHECK_LE(args.Length(), 2);
     bool check_value = args[0]->BooleanValue();
     std::string error_message;
     if (args.Length() == 2)
       error_message = "Error: " + std::string(*v8::String::AsciiValue(args[1]));
 
     v8::Handle<v8::StackTrace> stack_trace =
         v8::StackTrace::CurrentStackTrace(10);
     if (stack_trace.IsEmpty() || stack_trace->GetFrameCount() <= 0) {
       error_message += "\n    <no stack trace>";
     } else {
       for (size_t i = 0; i < (size_t) stack_trace->GetFrameCount(); ++i) {
         v8::Handle<v8::StackFrame> frame = stack_trace->GetFrame(i);
         CHECK(!frame.IsEmpty());
         error_message += base::StringPrintf("\n    at %s (%s:%d:%d)",
             ToStringOrDefault(frame->GetFunctionName(), "<anonymous>").c_str(),
             ToStringOrDefault(frame->GetScriptName(), "<anonymous>").c_str(),
             frame->GetLineNumber(),
             frame->GetColumn());
       }
     }
     DCHECK(check_value) << error_message;
-    LOG(WARNING) << error_message;
     return v8::Undefined();
   }
 
  private:
   std::string ToStringOrDefault(const v8::Handle<v8::String>& v8_string,
                                   const std::string& dflt) {
     if (v8_string.IsEmpty())
       return dflt;
     std::string ascii_value = *v8::String::AsciiValue(v8_string);
     return ascii_value.empty() ? dflt : ascii_value;
@@ skipping 11 matching lines @@
 }
 
 void InstallWebstoreBindings(ModuleSystem* module_system,
                              v8::Handle<v8::Object> chrome,
                              v8::Handle<v8::Object> chrome_hidden) {
   module_system->SetLazyField(chrome, "webstore", "webstore", "chromeWebstore");
   module_system->SetLazyField(chrome_hidden, "webstore", "webstore",
                               "chromeHiddenWebstore");
 }
 
-static v8::Handle<v8::Object> GetOrCreateChrome(
-    v8::Handle<v8::Context> context) {
-  v8::Handle<v8::String> chrome_string(v8::String::New("chrome"));
-  v8::Handle<v8::Object> global(context->Global());
-  v8::Handle<v8::Value> chrome(global->Get(chrome_string));
-  if (chrome.IsEmpty() || chrome->IsUndefined()) {
-    v8::Handle<v8::Object> chrome_object(v8::Object::New());
-    global->Set(chrome_string, chrome_object);
-    return chrome_object;
-  }
-  CHECK(chrome->IsObject());
-  return chrome->ToObject();
-}
-
 }  // namespace
 
 Dispatcher::Dispatcher()
     : content_watcher_(new ContentWatcher(this)),
       is_webkit_initialized_(false),
       webrequest_adblock_(false),
       webrequest_adblock_plus_(false),
       webrequest_other_(false),
       source_map_(&ResourceBundle::GetSharedInstance()) {
   const CommandLine& command_line = *(CommandLine::ForCurrentProcess());
   is_extension_process_ =
       command_line.HasSwitch(switches::kExtensionProcess) ||
       command_line.HasSwitch(switches::kSingleProcess);
 
   if (is_extension_process_) {
     RenderThread::Get()->SetIdleNotificationDelayInMs(
         kInitialExtensionIdleHandlerDelayMs);
   }
 
   user_script_slave_.reset(new UserScriptSlave(&extensions_));
-  request_sender_.reset(new RequestSender(this, &v8_context_set_));
+  request_sender_.reset(new RequestSender(this));
   PopulateSourceMap();
   PopulateLazyBindingsMap();
 }
 
 Dispatcher::~Dispatcher() {
 }
 
 bool Dispatcher::OnControlMessageReceived(const IPC::Message& message) {
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(Dispatcher, message)
@@ skipping 203 matching lines @@
 }  // namespace
 
 bool Dispatcher::AllowScriptExtension(WebFrame* frame,
                                       const std::string& v8_extension_name,
                                       int extension_group,
                                       int world_id) {
   g_hack_extension_group = extension_group;
   return true;
 }
 
+v8::Handle<v8::Object> Dispatcher::GetOrCreateObject(
+    v8::Handle<v8::Object> object,
+    const std::string& field) {
+  v8::HandleScope handle_scope;
+  v8::Handle<v8::String> key = v8::String::New(field.c_str());
+  // This little dance is for APIs that may be unavailable but have available
+  // children. For example, chrome.app can be unavailable, while
+  // chrome.app.runtime is available. The lazy getter for chrome.app must be
+  // deleted, so that there isn't an error when accessing chrome.app.runtime.
+  if (object->Has(key)) {
+    v8::Handle<v8::Value> value = object->Get(key);
+    if (!value->IsUndefined() && value->IsObject())

[not at google - send to devlin, 2013/03/01 00:36:06]

I think that IsObject implies !undefined so the first check can be removed.

[cduvall, 2013/03/01 00:43:52]

Done.

+      return handle_scope.Close(v8::Handle<v8::Object>::Cast(value));
+    else
+      object->Delete(key);
+  }
+
+  v8::Handle<v8::Object> new_object = v8::Object::New();
+  object->Set(key, new_object);
+  return handle_scope.Close(new_object);
+}
+
+void Dispatcher::RegisterSchemaGeneratedBindings(
+    ModuleSystem* module_system,
+    ChromeV8Context* context,
+    v8::Handle<v8::Context> v8_context) {
+  std::set<std::string> apis =
+      ExtensionAPI::GetSharedInstance()->GetAllAPINames();
+  for (std::set<std::string>::iterator it = apis.begin();
+       it != apis.end(); ++it) {
+    const std::string& api_name = *it;
+
+    std::vector<std::string> split;
+    base::SplitString(api_name, '.', &split);
+
+    v8::Handle<v8::Object> bind_object = GetOrCreateChrome(v8_context);
+    for (size_t i = 0; i < split.size() - 1; ++i)
+      bind_object = GetOrCreateObject(bind_object, split[i]);
+
+    if (lazy_bindings_map_.find(api_name) != lazy_bindings_map_.end()) {
+      InstallBindings(module_system, v8_context, api_name);
+    } else if (!source_map_.Contains(api_name)) {
+      module_system->RegisterNativeHandler(
+          api_name,
+          scoped_ptr<NativeHandler>(new BindingGeneratingNativeHandler(
+              module_system,
+              api_name,
+              "binding")));
+      module_system->SetNativeLazyField(bind_object,
+                                        split.back(),
+                                        api_name,
+                                        "binding");
+    } else {
+      module_system->SetLazyField(bind_object,
+                                  split.back(),
+                                  api_name,
+                                  "binding");
+    }
+  }
+}
+
 void Dispatcher::RegisterNativeHandlers(ModuleSystem* module_system,
                                         ChromeV8Context* context) {
   module_system->RegisterNativeHandler("event_bindings",
-      scoped_ptr<NativeHandler>(EventBindings::Get(this)));
+      scoped_ptr<NativeHandler>(
+          EventBindings::Create(this, context->v8_context())));
   module_system->RegisterNativeHandler("miscellaneous_bindings",
-      scoped_ptr<NativeHandler>(MiscellaneousBindings::Get(this)));
+      scoped_ptr<NativeHandler>(
+          MiscellaneousBindings::Get(this, context->v8_context())));
   module_system->RegisterNativeHandler("apiDefinitions",
-      scoped_ptr<NativeHandler>(new ApiDefinitionsNatives(this)));
+      scoped_ptr<NativeHandler>(new ApiDefinitionsNatives(this, context)));
   module_system->RegisterNativeHandler("sendRequest",
       scoped_ptr<NativeHandler>(
-          new SendRequestNatives(this, request_sender_.get())));
+          new SendRequestNatives(this, request_sender_.get(), context)));
   module_system->RegisterNativeHandler("setIcon",
       scoped_ptr<NativeHandler>(
-          new SetIconNatives(this, request_sender_.get())));
+          new SetIconNatives(this, request_sender_.get(), context)));
   module_system->RegisterNativeHandler("contentWatcherNative",
                                        content_watcher_->MakeNatives());
 
   // Natives used by multiple APIs.
   module_system->RegisterNativeHandler("file_system_natives",
-      scoped_ptr<NativeHandler>(new FileSystemNatives()));
+      scoped_ptr<NativeHandler>(new FileSystemNatives(context->v8_context())));
 
   // Custom bindings.
   module_system->RegisterNativeHandler("app",
       scoped_ptr<NativeHandler>(new AppBindings(this, context)));
   module_system->RegisterNativeHandler("app_runtime",
-      scoped_ptr<NativeHandler>(new AppRuntimeCustomBindings()));
+      scoped_ptr<NativeHandler>(
+          new AppRuntimeCustomBindings(this, context->v8_context())));
   module_system->RegisterNativeHandler("app_window",
-      scoped_ptr<NativeHandler>(new AppWindowCustomBindings(this)));
+      scoped_ptr<NativeHandler>(
+          new AppWindowCustomBindings(this, context->v8_context())));
   module_system->RegisterNativeHandler("context_menus",
       scoped_ptr<NativeHandler>(new ContextMenusCustomBindings()));
   module_system->RegisterNativeHandler("extension",
       scoped_ptr<NativeHandler>(
-          new ExtensionCustomBindings(this)));
+          new ExtensionCustomBindings(this, context->v8_context())));
   module_system->RegisterNativeHandler("sync_file_system",
       scoped_ptr<NativeHandler>(new SyncFileSystemCustomBindings()));
   module_system->RegisterNativeHandler("file_browser_handler",
-      scoped_ptr<NativeHandler>(new FileBrowserHandlerCustomBindings()));
+      scoped_ptr<NativeHandler>(new FileBrowserHandlerCustomBindings(
+          context->v8_context())));
   module_system->RegisterNativeHandler("file_browser_private",
-      scoped_ptr<NativeHandler>(new FileBrowserPrivateCustomBindings()));
+      scoped_ptr<NativeHandler>(new FileBrowserPrivateCustomBindings(
+          context->v8_context())));
   module_system->RegisterNativeHandler("i18n",
-      scoped_ptr<NativeHandler>(new I18NCustomBindings()));
+      scoped_ptr<NativeHandler>(
+          new I18NCustomBindings(this, context->v8_context())));
   module_system->RegisterNativeHandler("mediaGalleries",
       scoped_ptr<NativeHandler>(new MediaGalleriesCustomBindings()));
   module_system->RegisterNativeHandler("page_actions",
       scoped_ptr<NativeHandler>(
           new PageActionsCustomBindings(this)));
   module_system->RegisterNativeHandler("page_capture",
-      scoped_ptr<NativeHandler>(new PageCaptureCustomBindings()));
+      scoped_ptr<NativeHandler>(
+          new PageCaptureCustomBindings(this, context->v8_context())));
   module_system->RegisterNativeHandler("runtime",
-      scoped_ptr<NativeHandler>(new RuntimeCustomBindings(context)));
+      scoped_ptr<NativeHandler>(new RuntimeCustomBindings(this, context)));
   module_system->RegisterNativeHandler("tabs",
-      scoped_ptr<NativeHandler>(new TabsCustomBindings()));
+      scoped_ptr<NativeHandler>(
+          new TabsCustomBindings(this, context->v8_context())));
   module_system->RegisterNativeHandler("tts",
       scoped_ptr<NativeHandler>(new TTSCustomBindings()));
   module_system->RegisterNativeHandler("web_request",
       scoped_ptr<NativeHandler>(new WebRequestCustomBindings()));
   module_system->RegisterNativeHandler("webstore",
       scoped_ptr<NativeHandler>(new WebstoreBindings(this, context)));
 }
 
 void Dispatcher::PopulateSourceMap() {
   source_map_.RegisterSource("event_bindings", IDR_EVENT_BINDINGS_JS);
   source_map_.RegisterSource("miscellaneous_bindings",
       IDR_MISCELLANEOUS_BINDINGS_JS);
-  source_map_.RegisterSource("schema_generated_bindings",
-      IDR_SCHEMA_GENERATED_BINDINGS_JS);
   source_map_.RegisterSource("json", IDR_JSON_JS);
   source_map_.RegisterSource("json_schema", IDR_JSON_SCHEMA_JS);
-  source_map_.RegisterSource("apitest", IDR_EXTENSION_APITEST_JS);
+  source_map_.RegisterSource("test", IDR_TEST_CUSTOM_BINDINGS_JS);
 
   // Libraries.
   source_map_.RegisterSource("contentWatcher", IDR_CONTENT_WATCHER_JS);
   source_map_.RegisterSource("imageUtil", IDR_IMAGE_UTIL_JS);
   source_map_.RegisterSource("lastError", IDR_LAST_ERROR_JS);
   source_map_.RegisterSource("schemaUtils", IDR_SCHEMA_UTILS_JS);
   source_map_.RegisterSource("sendRequest", IDR_SEND_REQUEST_JS);
   source_map_.RegisterSource("setIcon", IDR_SET_ICON_JS);
   source_map_.RegisterSource("utils", IDR_UTILS_JS);
   source_map_.RegisterSource("entryIdManager", IDR_ENTRY_ID_MANAGER);
@@ skipping 46 matching lines @@
                              IDR_SYSTEM_INDICATOR_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("tabCapture", IDR_TAB_CAPTURE_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("tabs", IDR_TABS_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("tts", IDR_TTS_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("ttsEngine", IDR_TTS_ENGINE_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("types", IDR_TYPES_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("webRequest", IDR_WEB_REQUEST_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("webRequestInternal",
                              IDR_WEB_REQUEST_INTERNAL_CUSTOM_BINDINGS_JS);
   source_map_.RegisterSource("webstore", IDR_WEBSTORE_CUSTOM_BINDINGS_JS);
+  source_map_.RegisterSource("binding", IDR_BINDING_JS);
 
   // Platform app sources that are not API-specific..
   source_map_.RegisterSource("tagWatcher", IDR_TAG_WATCHER_JS);
-  source_map_.RegisterSource("webview", IDR_WEB_VIEW_JS);
+  source_map_.RegisterSource("web_view", IDR_WEB_VIEW_JS);
   source_map_.RegisterSource("denyWebview", IDR_WEB_VIEW_DENY_JS);
   source_map_.RegisterSource("platformApp", IDR_PLATFORM_APP_JS);
   source_map_.RegisterSource("injectAppTitlebar", IDR_INJECT_APP_TITLEBAR_JS);
 }
 
 void Dispatcher::PopulateLazyBindingsMap() {
   lazy_bindings_map_["app"] = InstallAppBindings;
   lazy_bindings_map_["webstore"] = InstallWebstoreBindings;
 }
 
@@ skipping 52 matching lines @@
       new ChromeV8Context(v8_context, frame, extension, context_type);
   v8_context_set_.Add(context);
 
   scoped_ptr<ModuleSystem> module_system(new ModuleSystem(v8_context,
                                                           &source_map_));
   // Enable natives in startup.
   ModuleSystem::NativesEnabledScope natives_enabled_scope(module_system.get());
 
   RegisterNativeHandlers(module_system.get(), context);
 
-  v8::Isolate* isolate = v8_context->GetIsolate();
+  module_system->RegisterNativeHandler("chrome",
+      scoped_ptr<NativeHandler>(new ChromeNativeHandler(v8_context)));
   module_system->RegisterNativeHandler("chrome_hidden",
-      scoped_ptr<NativeHandler>(new ChromeHiddenNativeHandler(isolate)));
+      scoped_ptr<NativeHandler>(new ChromeHiddenNativeHandler(v8_context)));
   module_system->RegisterNativeHandler("print",
-      scoped_ptr<NativeHandler>(new PrintNativeHandler(isolate)));
+      scoped_ptr<NativeHandler>(new PrintNativeHandler(v8_context)));
   module_system->RegisterNativeHandler("lazy_background_page",
       scoped_ptr<NativeHandler>(new LazyBackgroundPageNativeHandler(this)));
   module_system->RegisterNativeHandler("logging",
-      scoped_ptr<NativeHandler>(new LoggingNativeHandler(isolate)));
+      scoped_ptr<NativeHandler>(new LoggingNativeHandler(v8_context)));
+  module_system->RegisterNativeHandler("schema_registry",
+      scoped_ptr<NativeHandler>(
+          new SchemaRegistryNativeHandler(v8_schema_registry(), v8_context)));
+  module_system->RegisterNativeHandler("v8_context",
+      scoped_ptr<NativeHandler>(new V8ContextNativeHandler(context)));
 
   int manifest_version = extension ? extension->manifest_version() : 1;
   bool send_request_disabled =
       (extension && Manifest::IsUnpackedLocation(extension->location()) &&
        extension->has_lazy_background_page());
   module_system->RegisterNativeHandler("process",
       scoped_ptr<NativeHandler>(new ProcessInfoNativeHandler(
           this, context->GetExtensionID(),
           context->GetContextTypeDescription(),
           ChromeRenderProcessObserver::is_incognito_process(),
           manifest_version, send_request_disabled)));
 
   GetOrCreateChrome(v8_context);
 
   // Loading JavaScript is expensive, so only run the full API bindings
   // generation mechanisms in extension pages (NOT all web pages).
   switch (context_type) {
     case Feature::UNSPECIFIED_CONTEXT:
     case Feature::WEB_PAGE_CONTEXT:
       // TODO(kalman): see comment below about ExtensionAPI.
       InstallBindings(module_system.get(), v8_context, "app");
       InstallBindings(module_system.get(), v8_context, "webstore");
       break;
-
     case Feature::BLESSED_EXTENSION_CONTEXT:
     case Feature::UNBLESSED_EXTENSION_CONTEXT:
     case Feature::CONTENT_SCRIPT_CONTEXT: {
+      if (extension && !extension->is_platform_app())
+        module_system->Require("miscellaneous_bindings");
       module_system->Require("json");  // see paranoid comment in json.js
-      module_system->Require("miscellaneous_bindings");
-      module_system->Require("schema_generated_bindings");
-      module_system->Require("apitest");
 
       // TODO(kalman): move this code back out of the switch and execute it
       // regardless of |context_type|. ExtensionAPI knows how to return the
       // correct APIs, however, until it doesn't have a 2MB overhead we can't
       // load it in every process.
-      const std::set<std::string>& apis = context->GetAvailableExtensionAPIs();
-      for (std::set<std::string>::const_iterator i = apis.begin();
-           i != apis.end(); ++i) {
-        InstallBindings(module_system.get(), v8_context, *i);
-      }
-
+      RegisterSchemaGeneratedBindings(module_system.get(),
+                                      context,
+                                      v8_context);
       break;
     }
   }
 
   // Inject custom JS into the platform app context.
   if (IsWithinPlatformApp(frame))
     module_system->Require("platformApp");
 
   if (context_type == Feature::BLESSED_EXTENSION_CONTEXT) {
     bool has_permission = extension->HasAPIPermission(APIPermission::kWebView);
-    module_system->Require(has_permission ? "webview" : "denyWebview");
+    module_system->Require(has_permission ? "web_view" : "denyWebview");
   }
 
   context->set_module_system(module_system.Pass());
 
   context->DispatchOnLoadEvent(
       ChromeRenderProcessObserver::is_incognito_process(),
       manifest_version);
 
   VLOG(1) << "Num tracked contexts: " << v8_context_set_.size();
 }
@@ skipping 20 matching lines @@
   return extension && extension->is_platform_app();
 }
 
 void Dispatcher::WillReleaseScriptContext(
     WebFrame* frame, v8::Handle<v8::Context> v8_context, int world_id) {
   ChromeV8Context* context = v8_context_set_.GetByV8Context(v8_context);
   if (!context)
     return;
 
   context->DispatchOnUnloadEvent();
+  // TODO(kalman): add an invalidation observer interface to ChromeV8Context.
+  request_sender_->InvalidateContext(context);
 
   v8_context_set_.Remove(context);
   VLOG(1) << "Num tracked contexts: " << v8_context_set_.size();
 }
 
 void Dispatcher::DidCreateDocumentElement(WebKit::WebFrame* frame) {
   if (IsWithinPlatformApp(frame)) {
     // WebKit doesn't let us define an additional user agent stylesheet, so we
     // insert the default platform app stylesheet into all documents that are
     // loaded in each app.
@@ skipping 216 matching lines @@
   return Feature::UNSPECIFIED_CONTEXT;
 }
 
 void Dispatcher::OnExtensionResponse(int request_id,
                                      bool success,
                                      const base::ListValue& response,
                                      const std::string& error) {
   request_sender_->HandleResponse(request_id, success, response, error);
 }
 
-bool Dispatcher::CheckCurrentContextAccessToExtensionAPI(
-    const std::string& function_name) const {
-  ChromeV8Context* context = v8_context_set().GetCurrent();
+bool Dispatcher::CheckContextAccessToExtensionAPI(
+    const std::string& function_name, ChromeV8Context* context) const {
   if (!context) {
     DLOG(ERROR) << "Not in a v8::Context";
     return false;
   }
 
   if (!context->extension()) {
     v8::ThrowException(
         v8::Exception::Error(v8::String::New("Not in an extension.")));
     return false;
   }
@@ skipping 29 matching lines @@
     std::string error_msg = base::StringPrintf(kMessage, function_name.c_str());
     v8::ThrowException(
         v8::Exception::Error(v8::String::New(error_msg.c_str())));
     return false;
   }
 
   return true;
 }
 
 }  // namespace extensions