minidump_stackwalk should use MinidumpProcessor (#64). r=bryner

- minidump_stackwalk is now much more useful as a debugging tool and
   even as a standalone tool.
 - Reimplementation of minidump_stackwalk around MinidumpProcessor.
 - minidump_stackwalk displays all pertinent information returned by
   MinidumpProcessor in the ProcessState.
 - New PathnameStripper::File static utility method to display only the
   leaf file name in a pathname, cleaning up minidump_stackwalk's output.
 - New SimpleSymbolSupplier class, which implements a simple
   filesystem-based symbol supplier compatible with the layout used by
   Microsoft Symbol Server and its client cache.
 - minidump_stackwalk now accepts an optional second argument, a pathname
   to use as a symbol directory for a SimpleSymbolSupplier.
 - Updated test data to be compatible with SimpleSymbolSupplier, and added
   test data for kernel32.pdb.  Test data converted from CRLF line endings
   to LF.

http://groups.google.com/group/airbag-dev/browse_thread/thread/cce30a84f6b2d728


git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@53 4c0a9323-5329-0410-9bdc-e9ce6186880e

src/processor/testdata/minidump1.stack.out

@@ -1,23 +0,0 @@
-[ 0]  instruction = 0x020a1515  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x00221515
-[ 1]  instruction = 0x020a03e2  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x002203e2
-[ 2]  instruction = 0x023c8a27  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x00548a27
-[ 3]  instruction = 0x023ccfd8  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x0054cfd8
-[ 4]  instruction = 0x0222fd11  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x003afd11
-[ 5]  instruction = 0x022311dc  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x003b11dc
-[ 6]  instruction = 0x034eb0f0  "c:\lizard\trunk\mozilla\dist\bin\components\xpc3250.dll" + 0x0005b0f0
-[ 7]  instruction = 0x0049bda3  "c:\lizard\trunk\mozilla\dist\bin\js3250.dll" + 0x0007bda3
-[ 8]  instruction = 0x0047b92e  "c:\lizard\trunk\mozilla\dist\bin\js3250.dll" + 0x0005b92e
-[ 9]  instruction = 0x0046c944  "c:\lizard\trunk\mozilla\dist\bin\js3250.dll" + 0x0004c944
-[10]  instruction = 0x0046d344  "c:\lizard\trunk\mozilla\dist\bin\js3250.dll" + 0x0004d344
-[11]  instruction = 0x00430ec2  "c:\lizard\trunk\mozilla\dist\bin\js3250.dll" + 0x00010ec2
-[12]  instruction = 0x02213b7e  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x00393b7e
-[13]  instruction = 0x02249cec  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x003c9cec
-[14]  instruction = 0x0224a80f  "c:\lizard\trunk\mozilla\dist\bin\components\gklayout.dll" + 0x003ca80f
-[15]  instruction = 0x002ebff7  "c:\lizard\trunk\mozilla\dist\bin\xpcom_core.dll" + 0x0007bff7
-[16]  instruction = 0x002ec8eb  "c:\lizard\trunk\mozilla\dist\bin\xpcom_core.dll" + 0x0007c8eb
-[17]  instruction = 0x029193b4  "c:\lizard\trunk\mozilla\dist\bin\components\gkwidget.dll" + 0x000293b4
-[18]  instruction = 0x03174b18  "c:\lizard\trunk\mozilla\dist\bin\components\tkitcmps.dll" + 0x00004b18
-[19]  instruction = 0x10008e5f  "c:\lizard\trunk\mozilla\dist\bin\xul.dll" + 0x00008e5f
-[20]  instruction = 0x00401035  "c:\lizard\trunk\mozilla\dist\bin\firefox.exe" + 0x00001035
-[21]  instruction = 0x004011bb  "c:\lizard\trunk\mozilla\dist\bin\firefox.exe" + 0x000011bb
-[22]  instruction = 0x7c816d4e  "C:\WINDOWS\system32\kernel32.dll" + 0x00016d4e