Load definitions of symbols from .kotlin_metadata files

Extract AbstractDeserializedPackageFragmentProvider out of
JvmBuiltInsPackageFragmentProvider and implement it a little bit differently in
MetadataPackageFragmentProvider. The main difference is in how the package
fragment scope is constructed: for built-ins, it's just a single scope that
loads everything from one protobuf message. For metadata, package scope can
consist of many files, some of which store information about classes and others
are similar to package parts on JVM, so a ChainedMemberScope instance is
created.

Introduce a bunch of interfaces/methods to deliver the needed behavior to the
'deserialization' module which is not JVM-specific and does not depend on the
compiler code: MetadataFinderFactory,
PackagePartProvider#findMetadataPackageParts, KotlinMetadataFinder#findMetadata.
Note that these declarations are currently only implemented in the compiler; no
metadata package parts/fragments will be found in IDE or reflection

compiler/frontend/src/org/jetbrains/kotlin/analyzer/common/DefaultAnalyzerFacade.kt

@@ -16,6 +16,7 @@
 
 package org.jetbrains.kotlin.analyzer.common
 
+import com.intellij.openapi.components.ServiceManager
 import com.intellij.psi.search.GlobalSearchScope
 import org.jetbrains.kotlin.analyzer.*
 import org.jetbrains.kotlin.config.ApiVersion
@@ -30,9 +31,11 @@ import org.jetbrains.kotlin.context.LazyResolveToken
 import org.jetbrains.kotlin.context.ModuleContext
 import org.jetbrains.kotlin.context.ProjectContext
 import org.jetbrains.kotlin.descriptors.PackagePartProvider
+import org.jetbrains.kotlin.descriptors.impl.CompositePackageFragmentProvider
 import org.jetbrains.kotlin.descriptors.impl.ModuleDescriptorImpl
 import org.jetbrains.kotlin.frontend.di.configureModule
 import org.jetbrains.kotlin.incremental.components.LookupTracker
+import org.jetbrains.kotlin.load.kotlin.MetadataFinderFactory
 import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.resolve.*
@@ -40,6 +43,7 @@ import org.jetbrains.kotlin.resolve.lazy.FileScopeProviderImpl
 import org.jetbrains.kotlin.resolve.lazy.ResolveSession
 import org.jetbrains.kotlin.resolve.lazy.declarations.DeclarationProviderFactory
 import org.jetbrains.kotlin.resolve.lazy.declarations.DeclarationProviderFactoryService
+import org.jetbrains.kotlin.serialization.deserialization.MetadataPackageFragmentProvider
 
 /**
  * A facade that is used to analyze platform independent modules in multi-platform projects.
@@ -97,7 +101,12 @@ object DefaultAnalyzerFacade : AnalyzerFacade<PlatformAnalysisParameters>() {
                 moduleContext, trace, declarationProviderFactory, moduleContentScope, targetEnvironment, packagePartProvider
         )
 
-        return ResolverForModule(container.get<ResolveSession>().packageFragmentProvider, container)
+        val packageFragmentProviders = listOf(
+                container.get<ResolveSession>().packageFragmentProvider,
+                container.get<MetadataPackageFragmentProvider>()
+        )
+
+        return ResolverForModule(CompositePackageFragmentProvider(packageFragmentProviders), container)
     }
 
     private fun createContainerToResolveCommonCode(
@@ -119,6 +128,11 @@ object DefaultAnalyzerFacade : AnalyzerFacade<PlatformAnalysisParameters>() {
         useImpl<CompilerDeserializationConfiguration>()
         useInstance(packagePartProvider)
         useInstance(declarationProviderFactory)
+        useImpl<MetadataPackageFragmentProvider>()
+
+        val metadataFinderFactory = ServiceManager.getService(moduleContext.project, MetadataFinderFactory::class.java)
+                                    ?: error("No MetadataFinderFactory in project")
+        useInstance(metadataFinderFactory.create(moduleContentScope))
 
         targetEnvironment.configure(this)
         useImpl<LazyResolveToken>()

compiler/frontend/src/org/jetbrains/kotlin/load/kotlin/MetadataFinderFactory.kt

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.load.kotlin
+
+import com.intellij.psi.search.GlobalSearchScope
+import org.jetbrains.kotlin.serialization.deserialization.KotlinMetadataFinder
+
+interface MetadataFinderFactory {
+    fun create(scope: GlobalSearchScope): KotlinMetadataFinder
+}