In build.gradle file add one of the following:
dependencies {
compile 'com.tencent.mm.opensdk:wechat-sdk-android-with-mta:+'
}

• What went wrong:
  A problem occurred evaluating root project 'webrowser'.

Could not find method compile() for arguments [com.tencent.mm.opensdk:wechat-sdk-android-with-mta:+] on object of type org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.

Cause

edit wrong android/build.gradle

Solution

edit correct android/app/build.gradle.