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

Clang version changed 223108:230914
Details: 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

webrtc/modules/utility/source/coder.h

@@ -42,13 +42,12 @@ public:
                    size_t& encodedLengthInBytes);
 
 protected:
-    virtual int32_t SendData(
-        FrameType frameType,
-        uint8_t payloadType,
-        uint32_t timeStamp,
-        const uint8_t* payloadData,
-        size_t payloadSize,
-        const RTPFragmentationHeader* fragmentation) OVERRIDE;
+ int32_t SendData(FrameType frameType,
+                  uint8_t payloadType,
+                  uint32_t timeStamp,
+                  const uint8_t* payloadData,
+                  size_t payloadSize,
+                  const RTPFragmentationHeader* fragmentation) override;
 
 private:
  rtc::scoped_ptr<AudioCodingModule> _acm;