Don't send unnecessary ExtensionMsg_Loaded IPCs.

extensions/renderer/script_context.cc

 // Copyright 2014 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 "extensions/renderer/script_context.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ skipping 78 matching lines @@
       v8_context_(v8_context->GetIsolate(), v8_context),
       web_frame_(web_frame),
       extension_(extension),
       context_type_(context_type),
       effective_extension_(effective_extension),
       effective_context_type_(effective_context_type),
       safe_builtins_(this),
       isolate_(v8_context->GetIsolate()),
       url_(web_frame_ ? GetDataSourceURLForFrame(web_frame_) : GURL()),
       runner_(new Runner(this)) {
-  VLOG(1) << "Created context:\n"
-          << "  extension id: " << GetExtensionID() << "\n"
-          << "  frame:        " << web_frame_ << "\n"
-          << "  URL:          " << GetURL() << "\n"
-          << "  context type: " << GetContextTypeDescription() << "\n"
-          << "  effective extension id: "
-          << (effective_extension_.get() ? effective_extension_->id() : "")
-          << "  effective context type: "
-          << GetEffectiveContextTypeDescription();
+  VLOG(1) << "Created context:\n" << GetDebugString();
   gin::PerContextData* gin_data = gin::PerContextData::From(v8_context);
   CHECK(gin_data);  // may fail if the v8::Context hasn't been registered yet
   gin_data->set_runner(runner_.get());
 }
 
 ScriptContext::~ScriptContext() {
   VLOG(1) << "Destroyed context for extension\n"
           << "  extension id: " << GetExtensionID() << "\n"
           << "  effective extension id: "
           << (effective_extension_.get() ? effective_extension_->id() : "");
@@ skipping 108 matching lines @@
   module_system_->CallModuleMethod(
       kEventBindings, "dispatchEvent", arraysize(argv), argv);
 }
 
 void ScriptContext::DispatchOnUnloadEvent() {
   v8::HandleScope handle_scope(isolate());
   v8::Context::Scope context_scope(v8_context());
   module_system_->CallModuleMethod("unload_event", "dispatch");
 }
 
-std::string ScriptContext::GetContextTypeDescription() {
+std::string ScriptContext::GetContextTypeDescription() const {
   return GetContextTypeDescriptionString(context_type_);
 }
 
-std::string ScriptContext::GetEffectiveContextTypeDescription() {
+std::string ScriptContext::GetEffectiveContextTypeDescription() const {
   return GetContextTypeDescriptionString(effective_context_type_);
 }
 
 GURL ScriptContext::GetURL() const {
   return url_;
 }
 
 bool ScriptContext::IsAnyFeatureAvailableToContext(const Feature& api) {
   return ExtensionAPI::GetSharedInstance()->IsAnyFeatureAvailableToContext(
       api, extension(), context_type(), GetDataSourceURLForFrame(web_frame()));
@@ skipping 115 matching lines @@
   Feature::Availability availability = GetAvailability(name);
   if (!availability.is_available()) {
     isolate()->ThrowException(v8::Exception::Error(
         v8::String::NewFromUtf8(isolate(), availability.message().c_str())));
     return false;
   }
 
   return true;
 }
 
+std::string ScriptContext::GetDebugString() const {
+  return base::StringPrintf(
+      "  extension id:           %s\n"
+      "  frame:                  %p\n"
+      "  URL:                    %s\n"
+      "  context_type:           %s\n"
+      "  effective extension id: %s\n"
+      "  effective context type: %s",
+      extension_.get() ? extension_->id().c_str() : "(none)", web_frame_,
+      GetURL().spec().c_str(), GetContextTypeDescription().c_str(),
+      effective_extension_.get() ? effective_extension_->id().c_str()
+                                 : "(none)",
+      GetEffectiveContextTypeDescription().c_str());
+}
+
 ScriptContext::Runner::Runner(ScriptContext* context) : context_(context) {
 }
 
 void ScriptContext::Runner::Run(const std::string& source,
                                 const std::string& resource_name) {
   context_->module_system()->RunString(source, resource_name);
 }
 
 v8::Local<v8::Value> ScriptContext::Runner::Call(
     v8::Local<v8::Function> function,
     v8::Local<v8::Value> receiver,
     int argc,
     v8::Local<v8::Value> argv[]) {
   return context_->CallFunction(function, argc, argv);
 }
 
 gin::ContextHolder* ScriptContext::Runner::GetContextHolder() {
   v8::HandleScope handle_scope(context_->isolate());
   return gin::PerContextData::From(context_->v8_context())->context_holder();
 }
 
 }  // namespace extensions