[Merge to 2743] Exit immediately on failure to allocate SharedMemory.

[Merge to 2743] Exit immediately on failure to allocate SharedMemory.

Callers of ChildSharedBitmapManager::AllocateSharedMemoryBitmap are not prepared
to handle failures. The existence of the FastShutdown path means that any
message might fail. Either all callers of
ChildSharedBitmapManager::AllocateSharedMemoryBitmap need to handle failure, or
else the process needs to exit immediately. The latter seems more manageable.

BUG=615121
Review-Url: https://codereview.chromium.org/2028833003
Cr-Commit-Position: refs/heads/master@{#397496}
(cherry picked from commit 7eb3f7fe5233455626980c3517f7fa189e6c9675)

Committed: https://chromium.googlesource.com/chromium/src/+/9ac167cc11c50985776c4281a77c33f66f4cf97e

[erikchen, 2016-06-06 21:01:56]

Description was changed from

==========
[Merge to 2743] Exit immediately on failure to allocate SharedMemory.

Callers of ChildSharedBitmapManager::AllocateSharedMemoryBitmap are not prepared
to handle failures. The existence of the FastShutdown path means that any
message might fail. Either all callers of
ChildSharedBitmapManager::AllocateSharedMemoryBitmap need to handle failure, or
else the process needs to exit immediately. The latter seems more manageable.

BUG=615121

Review-Url: https://codereview.chromium.org/2028833003
Cr-Commit-Position: refs/heads/master@{#397496}
(cherry picked from commit 7eb3f7fe5233455626980c3517f7fa189e6c9675)
==========

to

==========
[Merge to 2743] Exit immediately on failure to allocate SharedMemory.

Callers of ChildSharedBitmapManager::AllocateSharedMemoryBitmap are not prepared
to handle failures. The existence of the FastShutdown path means that any
message might fail. Either all callers of
ChildSharedBitmapManager::AllocateSharedMemoryBitmap need to handle failure, or
else the process needs to exit immediately. The latter seems more manageable.

BUG=615121

Review-Url: https://codereview.chromium.org/2028833003
Cr-Commit-Position: refs/heads/master@{#397496}
(cherry picked from commit 7eb3f7fe5233455626980c3517f7fa189e6c9675)

Committed:
https://chromium.googlesource.com/chromium/src/+/9ac167cc11c50985776c4281a77c...
==========

[erikchen, 2016-06-06 21:01:58]

Committed patchset #1 (id:1) manually as
9ac167cc11c50985776c4281a77c33f66f4cf97e.