Revert "Proguard config as files in L8"

This reverts commit 9715e5cf9e476b157d6d4f1f95bb924b520e3210.

Reason for revert: bot failures

Change-Id: Ic433ba296777ffd7514781426951f68760c969f3
diff --git a/src/main/java/com/android/tools/r8/L8Command.java b/src/main/java/com/android/tools/r8/L8Command.java
index 1373928..d1a8e6a 100644
--- a/src/main/java/com/android/tools/r8/L8Command.java
+++ b/src/main/java/com/android/tools/r8/L8Command.java
@@ -13,7 +13,6 @@
 import com.android.tools.r8.utils.Pair;
 import com.android.tools.r8.utils.Reporter;
 import com.android.tools.r8.utils.StringDiagnostic;
-import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
@@ -151,8 +150,7 @@
   @Keep
   public static class Builder extends BaseCompilerCommand.Builder<L8Command, Builder> {
 
-    private final List<Pair<List<String>, Origin>> proguardConfigStrings = new ArrayList<>();
-    private final List<Path> proguardConfigFiles = new ArrayList<>();
+    private final List<Pair<List<String>, Origin>> proguardConfigs = new ArrayList<>();
 
     private Builder() {
       this(new DefaultL8DiagnosticsHandler());
@@ -164,7 +162,7 @@
 
     public boolean isShrinking() {
       // Answers true if keep rules, even empty, are provided.
-      return !proguardConfigStrings.isEmpty() || !proguardConfigFiles.isEmpty();
+      return !proguardConfigs.isEmpty();
     }
 
     @Override
@@ -177,22 +175,10 @@
       return CompilationMode.DEBUG;
     }
 
-    /** Add proguard configuration-file resources. */
-    public Builder addProguardConfigurationFiles(Path... paths) {
-      Collections.addAll(proguardConfigFiles, paths);
-      return self();
-    }
-
-    /** Add proguard configuration-file resources. */
-    public Builder addProguardConfigurationFiles(List<Path> paths) {
-      proguardConfigFiles.addAll(paths);
-      return self();
-    }
-
     /** Add proguard configuration. */
     public Builder addProguardConfiguration(List<String> lines, Origin origin) {
-      proguardConfigStrings.add(new Pair<>(lines, origin));
-      return self();
+      proguardConfigs.add(new Pair<>(lines, origin));
+      return this;
     }
 
     @Override
@@ -252,10 +238,9 @@
             inputs.getLibraryResourceProviders()) {
           r8Builder.addLibraryResourceProvider(libraryResourceProvider);
         }
-        for (Pair<List<String>, Origin> proguardConfig : proguardConfigStrings) {
+        for (Pair<List<String>, Origin> proguardConfig : proguardConfigs) {
           r8Builder.addProguardConfiguration(proguardConfig.getFirst(), proguardConfig.getSecond());
         }
-        r8Builder.addProguardConfigurationFiles(proguardConfigFiles);
         r8Command = r8Builder.makeCommand();
       } else {
         D8Command.Builder d8Builder =
diff --git a/src/test/java/com/android/tools/r8/L8CommandTest.java b/src/test/java/com/android/tools/r8/L8CommandTest.java
index d13ef12..525a9ec 100644
--- a/src/test/java/com/android/tools/r8/L8CommandTest.java
+++ b/src/test/java/com/android/tools/r8/L8CommandTest.java
@@ -8,15 +8,9 @@
 import static org.junit.Assert.assertTrue;
 
 import com.android.tools.r8.dex.Marker;
-import com.android.tools.r8.origin.Origin;
 import com.android.tools.r8.utils.AndroidApiLevel;
-import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
 import java.nio.file.Path;
-import java.util.ArrayList;
 import java.util.Collection;
-import java.util.Collections;
-import java.util.List;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
@@ -123,46 +117,4 @@
                     StringResource.fromFile(ToolHelper.DESUGAR_LIB_JSON_FOR_TESTING))
                 .build());
   }
-
-  @Test
-  public void addProguardConfigurationString() throws Throwable {
-    String keepRule = "-keep class java.time.*";
-    List<String> keepRules = new ArrayList<>();
-    keepRules.add(keepRule);
-    L8Command.Builder builder =
-        prepareBuilder(new TestDiagnosticMessagesImpl())
-            .setProgramConsumer(DexIndexedConsumer.emptyConsumer())
-            .addDesugaredLibraryConfiguration(
-                StringResource.fromFile(ToolHelper.DESUGAR_LIB_JSON_FOR_TESTING))
-            .addProguardConfiguration(keepRules, Origin.unknown());
-    assertTrue(builder.isShrinking());
-    assertNotNull(builder.build().getR8Command());
-  }
-
-  @Test
-  public void addProguardConfigurationFile() throws Throwable {
-    String keepRule = "-keep class java.time.*";
-    Path keepRuleFile = temp.newFile("keepRuleFile.txt").toPath();
-    Files.write(keepRuleFile, Collections.singletonList(keepRule), StandardCharsets.UTF_8);
-
-    L8Command.Builder builder1 =
-        prepareBuilder(new TestDiagnosticMessagesImpl())
-            .setProgramConsumer(DexIndexedConsumer.emptyConsumer())
-            .addDesugaredLibraryConfiguration(
-                StringResource.fromFile(ToolHelper.DESUGAR_LIB_JSON_FOR_TESTING))
-            .addProguardConfigurationFiles(keepRuleFile);
-    assertTrue(builder1.isShrinking());
-    assertNotNull(builder1.build().getR8Command());
-
-    List<Path> keepRuleFiles = new ArrayList<>();
-    keepRuleFiles.add(keepRuleFile);
-    L8Command.Builder builder2 =
-        prepareBuilder(new TestDiagnosticMessagesImpl())
-            .setProgramConsumer(DexIndexedConsumer.emptyConsumer())
-            .addDesugaredLibraryConfiguration(
-                StringResource.fromFile(ToolHelper.DESUGAR_LIB_JSON_FOR_TESTING))
-            .addProguardConfigurationFiles(keepRuleFiles);
-    assertTrue(builder2.isShrinking());
-    assertNotNull(builder2.build().getR8Command());
-  }
 }