Since the Blink rename, enum entry names now use the kCamelCase naming
convention instead of SHOUTY_CASE. This doesn't match well with Java
naming conventions and Java constants created by java_cpp_enum.py look
out of place with the rest of the Java codebase.
This CL modifies java_cpp_enum.py so that C++ enum naming conventions
don't leak into the Java side, specifically translating kCamelCase and
CamelCase enum entries to SHOUTY_CASE.
BUG=710335
Review-Url: https://codereview.chromium.org/2815103004
Cr-Original-Commit-Position: refs/heads/master@{#464661}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 23b8f65ce75fc2ff04a28cb5a940861c134e0797
