Roll chromium_revision e144d30..6fdb142 (318658:318841) + remove OVERRIDE macro

Clang version changed 223108:230914
Details: https://chromium.googlesource.com/chromium/src/+/e144d30..6fdb142/tools/clang/scripts/update.sh

Removes the OVERRIDE macro defined in:
* webrtc/base/common.h
* webrtc/typedefs.h

The majority of the source changes were done by running this in src/:
perl -0pi -e "s/virtual\s([^({;]*(\([^({;]*\)[^({;]*))(OVERRIDE|override)/\1override/sg" `find {talk,webrtc} -name "*.h"  -o -name "*.cc*" -o -name "*.mm*"`

which converted all:
virtual Foo() OVERRIDE
functions to:
Foo() override

Then I manually edited:
* talk/media/webrtc/fakewebrtccommon.h
* webrtc/test/fake_common.h

Remaining uses of OVERRIDE was fixed by search+replace.

Manual edits were done to fix virtual destructors that were
overriding inherited ones.

Finally a build error related to the pure virtual definitions of
Read, Write and Rewind in common_types.h required a bit of
refactoring in:
* webrtc/common_types.cc
* webrtc/common_types.h
* webrtc/system_wrappers/interface/file_wrapper.h
* webrtc/system_wrappers/source/file_impl.cc

This roll should make it possible for us to finally re-enable deadlock
detection for TSan on the buildbots.

BUG=4106
R=pbos@webrtc.org, tommi@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/41069004

Cr-Commit-Position: refs/heads/master@{#8596}
git-svn-id: http://webrtc.googlecode.com/svn/trunk@8596 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/modules/bitrate_controller/bitrate_controller_impl.h b/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
index 1646f75..f089be9 100644
--- a/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
+++ b/webrtc/modules/bitrate_controller/bitrate_controller_impl.h
@@ -32,23 +32,23 @@
   BitrateControllerImpl(Clock* clock, BitrateObserver* observer);
   virtual ~BitrateControllerImpl();
 
-  virtual bool AvailableBandwidth(uint32_t* bandwidth) const override;
+  bool AvailableBandwidth(uint32_t* bandwidth) const override;
 
-  virtual RtcpBandwidthObserver* CreateRtcpBandwidthObserver() override;
+  RtcpBandwidthObserver* CreateRtcpBandwidthObserver() override;
 
-  virtual void SetStartBitrate(int start_bitrate_bps) override;
-  virtual void SetMinMaxBitrate(int min_bitrate_bps,
+  void SetStartBitrate(int start_bitrate_bps) override;
+  void SetMinMaxBitrate(int min_bitrate_bps,
                                 int max_bitrate_bps) override;
 
-  virtual void SetReservedBitrate(uint32_t reserved_bitrate_bps) override;
+  void SetReservedBitrate(uint32_t reserved_bitrate_bps) override;
 
-  virtual int64_t TimeUntilNextProcess() override;
-  virtual int32_t Process() override;
+  int64_t TimeUntilNextProcess() override;
+  int32_t Process() override;
 
   // Current bitrate actually being sent.
-  virtual void SetBitrateSent(uint32_t bitrate_sent_bps) override;
+  void SetBitrateSent(uint32_t bitrate_sent_bps) override;
 
-  virtual void SetCodecMode(webrtc::VideoCodecMode mode) override;
+  void SetCodecMode(webrtc::VideoCodecMode mode) override;
 
  private:
   class RtcpBandwidthObserverImpl;