title: Getting an issue while integrating google-cloud with webpack
body: <p>I am integrating the google-cloud npm package with my react application and i am using firebase.</p>
  
  <p>Errors i am encountering -</p>
  
  <blockquote>
    <p>WARNING in ./~/google-cloud/~/hash-stream-validation/index.js Module
    not found: Error: Can't resolve 'fast-crc32c' in
    '/home/linuxbox/React-Workspace/Kaptify/node_modules/google-cloud/node_modules/hash-stream-validation'
    @ ./~/google-cloud/~/hash-stream-validation/index.js 5:8-30  @
    ./~/google-cloud/~/@google-cloud/storage/src/file.js  @
    ./~/google-cloud/~/@google-cloud/storage/src/index.js  @
    ./~/google-cloud/src/index.js  @ ./src/actions/UserStateStore.js  @
    ./app.js  @ multi (webpack)-dev-server/client?<a href="http://127.0.0.1:3000" rel="noreferrer">http://127.0.0.1:3000</a>
    webpack/hot/dev-server ./app.js</p>
    
    <p>WARNING in ./~/google-cloud/~/google-auto-auth/index.js 53:13-58
    Critical dependency: the request of a dependency is an expression</p>
    
    <p>WARNING in ./~/google-cloud/~/grpc/src/node/src/grpc_extension.js
    38:14-35 Critical dependency: the request of a dependency is an
    expression</p>
    
    <p>WARNING in ./~/google-cloud/~/node-pre-gyp/lib/pre-binding.js 19:22-48
    Critical dependency: the request of a dependency is an expression</p>
    
    <p>WARNING in ./~/google-cloud/~/node-pre-gyp/lib/util/versioning.js
    15:20-67 Critical dependency: the request of a dependency is an
    expression</p>
  </blockquote>
  
  <p>Can anybody help me to resolve this?</p>