Revert of Significantly cleans up the ImageWriter Operation class and subclasses. (https://codereview.chromium.org/149313003/)

Reason for revert:
Broke ASAN bots.

http://build.chromium.org/p/chromium.memory/builders/Linux%20ASAN%20Tests%20%282%29/builds/23085/steps/unit_tests/logs/DownloadFile

Original issue's description:
> Significantly cleans up the ImageWriter Operation class and subclasses.
> 
> * Moved Operations to be in CPS for stage isolation.
> * Updates unit tests to use isolated stages.
> * Adds unit tests for uncovered stages.
> * Cleans up temporary file handling.
> * Removes unnecessary and redundant code (CompareFiles, ImageReader).
> * Fixes bug with verification progress updates.
> * All .zip files now unzipped before burning.
> * All non-.zip files not unzipped before burning.
> * Removes unnecessary complexity, e.g. unnecessary scoped_ptrs.
> 
> BUG=292956
> BUG=337883
> BUG=335404
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251704

TBR=tbarzic@chromium.org,haven@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=292956

Review URL: https://codereview.chromium.org/170123002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251729 0039d316-1c4b-4281-b951-d872f2087c98
Revert of Re-enable prerender RemovingLink browser tests. (https://codereview.chromium.org/142013004/)

Reason for revert:
Failing on XP Tests 1, build 30187 and onwards.
Also failing on XP Tests 2 and 3.

[ RUN      ] PrerenderBrowserTest.PrerenderPageRemovingLinkWithTwoLinks
HTTP server started on 127.0.0.1:4080...
sending server_data: {"host": "127.0.0.1", "port": 4080} (35 bytes)
File not found prerender/prerender_page.html%E2%80%93)%C3%A4%C2%B3%C3%BBh%C3%BE)%C3%ACz%C2%BB full path:E:\b\build\slave\XP_Tests__1_\build\src\chrome/test/data\prerender\prerender_page.html%E2%80%93)%C3%A4%C2%B3%C3%BBh%C3%BE)%C3%ACz%C2%BB
127.0.0.1 - - [14/Feb/2014 22:17:53] code 404, message Not Found
[2656:2572:0214/221753:3777828:INFO:CONSOLE(1)] "Uncaught ReferenceError: DidPrerenderPass is not defined", source:  (1)

Original issue's description:
> Re-enable prerender RemovingLink browser tests.
> 
> The tests have changed significantly since they were first disabled. Add a
> WaitForStop or two for good measure, but leave them as-is for the most part.
> They can be disabled again if they still flake. Merge their custom prerender
> loader into the main one; it's mostly the same.
> 
> In addition, for better test coverage, add a new test which asserts on events
> received when a <link rel=prerender> is added for an existing prerender after
> that prerender has loaded. Significantly rework the prerender events logic
> to allow the test framework to wait on an event being received in the loader.
> 
> BUG=167340, 128841
> 
> Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=251495

TBR=mmenke@chromium.org,davidben@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=167340, 128841

Review URL: https://codereview.chromium.org/170173003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251732 0039d316-1c4b-4281-b951-d872f2087c98