[M49_2623] Chromium upversion to m49_2623 branch.

[M49_2623] Chromium upversion to m49_2623 branch.

This patch deals with following changes:

1. Set gcc_version gyp variable.
2. base/basictypes.h is removed in upstream.
   Replace (u)int{8,16,32,64} with (u)int{8,16,32,64}_t.
3. SingleThreadTaskGraphRunner is now part of upstream available under
   cc namespace.
4. scoped_ptr .Pass() is deprecated, use std::move instead.
5. Use GenerateSyncToken() to generate a new SyncToken.
6. ScopedVector<> to std::vector<scoped_ptr<>> conversion is not possible.
   Replace when there is mismatch in parameter passing or assignment.
7. COMPILE_ASSERT macro is removed from base/macros.h.
   Use static_assert instead.
8. WebPageSerializer has been removed from blink.
   Commented part of code that calls it.
9. Changes in number and type of arguments for many API's.
10. Indentation fixes by 'git cl format' for the files that are modified in
    this commit only.

Bug: http://165.213.149.170/jira/browse/TWF-345

Change-Id: Ice87e1b73430ba3d269f5632b73c9f14e8fef60b
Signed-off-by: Gajendra N <gajendra.n@samsung.com>