Add version aware name resolution

Add version aware name resolution

Currently the IDL find a parent type by a simple lookup of where
a symbol name maps directly to an AST node.  This change provides
a mechanism for replacing the directy dictionary with a 
version or version range based search.

BUG= http://code.google.com/p/chromium/issues/detail?id=87684
TEST= python idl_namespace.py
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=91427

[sehr (please use chromium), 2011-07-01 22:58:51]

LGTM.  Some nits.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
File ppapi/generators/idl_namespace.py (right):

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:75: # if the max and min overlap, than's an
error
This requires that versioned information appear in ascending order also.  You
should put that in a comment earlier.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:220: # Dumps all the information relavent to
an add failure.
relevant

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:265: # Verify the namespace find the correct
nodes based on range
Can't parse this comment.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:293: #Verify we succeed with undeprecated adds
s/#V/# V/

[noelallen1, 2011-07-02 19:51:32]

Done.  Thanks.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
File ppapi/generators/idl_namespace.py (right):

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:75: # if the max and min overlap, than's an
error
On 2011/07/01 22:58:51, sehr wrote:
> This requires that versioned information appear in ascending order also.  You
> should put that in a comment earlier.

Done.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:220: # Dumps all the information relavent to
an add failure.
On 2011/07/01 22:58:51, sehr wrote:
> relevant

Done.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:265: # Verify the namespace find the correct
nodes based on range
On 2011/07/01 22:58:51, sehr wrote:
> Can't parse this comment.

Done.

http://codereview.chromium.org/7253025/diff/3001/ppapi/generators/idl_namespa...
ppapi/generators/idl_namespace.py:293: #Verify we succeed with undeprecated adds
On 2011/07/01 22:58:51, sehr wrote:
> s/#V/# V/

Done.