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Component builds are, by definition, not optimized for maximum
performance. So incremental linking - which trades a little bit of
performance for much faster build times - is appropriate in release
component builds, as well as in debug builds.

This change enables incremental linking in release component builds.
This also requires turning off /OPT:ICF and /PROFILE in component
builds because they are incompatible with /incremental, but they are
performance related flags so they are also not important for component
builds.

blink_core.dll cannot be incrementally linked in debug x64 component
builds, but it *can* be incrementally linked in release x64 component
builds (and debug/release x86 component builds), and this change
enables incremental linking of blink_core.dll in all supported
configurations.

This drops the chrome rebuild time after touching
third_party\WebKit\Source\core\html\AutoplayExperimentHelper.cpp from
~260 seconds to 9 seconds. The chrome rebuild time after touching
base\win\registry.cc drops from ~200 seconds to less than 2 seconds,
with 21 of 24 link steps skipped entirely.

This also fixes some /INCREMENTAL /OPT:ICF mismatch warnings.

BUG=608801,621236

Review-Url: https://codereview.chromium.org/2331373006
Cr-Commit-Position: refs/heads/master@{#418660}