Switch to double for time calculations using playback rate.

media/blink/buffered_resource_loader_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <string>
 
 #include "base/bind.h"
 #include "base/format_macros.h"
 #include "base/message_loop/message_loop.h"
@@ skipping 1050 matching lines @@
   Initialize(kHttpUrl, -1, -1);
   Start();
   loader_->SetPlaybackRate(0);
   CheckBufferWindowBounds();
   StopWhenLoad();
 }
 
 TEST_F(BufferedResourceLoaderTest, BufferWindow_PlaybackRate_BelowLowerBound) {
   Initialize(kHttpUrl, -1, -1);
   Start();
-  loader_->SetPlaybackRate(0.1f);
+  loader_->SetPlaybackRate(0.1);
   CheckBufferWindowBounds();
   StopWhenLoad();
 }
 
 TEST_F(BufferedResourceLoaderTest, BufferWindow_PlaybackRate_WithinBounds) {
   Initialize(kHttpUrl, -1, -1);
   Start();
   loader_->SetPlaybackRate(10);
   CheckBufferWindowBounds();
   StopWhenLoad();
@@ skipping 68 matching lines @@
 
   // As soon as we have received enough data to fulfill the read, defer.
   EXPECT_CALL(*this, LoadingCallback(BufferedResourceLoader::kLoadingDeferred));
   EXPECT_CALL(*this, ReadCallback(BufferedResourceLoader::kOk, 10));
   WriteLoader(19, 1);
   VerifyBuffer(buffer, 10, 10);
   EXPECT_FALSE(HasActiveLoader());
 }
 
 }  // namespace media