Proguard: Logging stripped and allowaccessmodification turned on

chrome/android/java/proguard.flags

 # Keep line number information, useful for stack traces.
 -keepattributes SourceFile,LineNumberTable
 
 # Keep the annotations.
 -keep @interface ***
 
 # Disable obfuscation for the following two packages.
 -keepnames class com.google.android.apps.chrome.**,org.chromium.** {
   *;
 }
@@ skipping 75 matching lines @@
 # platform version.  We know about them, and they are safe.
 -dontwarn android.support.**
 
 # Proguard mistakenly optimizes away some null checks on final fields
 # in the support library.
 # See https://sourceforge.net/p/proguard/bugs/531/#fdc9/41e2
 -keepclassmembers,allowshrinking,allowobfuscation class android.support.v7.widget.AppCompatButton {
   !static final <fields>;
 }
 
+# Allowing Proguard to change modifiers. This change shrinks the .dex size by
+# ~1.1%, and reduces the method count by ~4.3%.
+-allowaccessmodification
+
+# Allows Proguard freedom in removing these log related calls. We ask for debug
+# and verbose logs to be stripped out in base.Log, so we are just ensuring we
+# get rid of all other debug/verbose logs.
+-assumenosideeffects class android.util.Log {
+  static *** d(...);
+  static *** v(...);
+  static *** isLoggable(...);
+}
+
 # Everything below this is kept because they are referenced by the test APK.
 -dontwarn javax.annotation.Nullable
 
 -keep class android.support.v7.mediarouter.R* {
   *;
 }
 
 -keep class android.support.v7.media.MediaRouteProvider** {
   *;
 }
@@ skipping 55 matching lines @@
 # Needed to run ChromeTest.apk
 -keepnames class com.google.android.gms.common.GoogleApiAvailability {
   *;
 }
 
 #-keep public class android.net.http.SslCertificate
 #-keep public class android.webkit.WebVie
 
 #-dontwarn android.webkit.WebView
 -dontwarn android.net.http.SslCertificate