The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/afa48c3ed31f7229c306ce7cda62111be593f719

commit afa48c3ed31f7229c306ce7cda62111be593f719
Author: kouhei <kouhei@chromium.org>
Date: Thu Oct 13 03:04:01 2016

CSSStyleSheetResource should cache decoded text instead of raw bytes

Before this CL, CSSStyleSheetResource kept undecoded text alive, and
decoded text whenever it was requested.

After this CL, the decoded text is kept alive as cache.
It discards undecoded text when the whole sheet text is loaded to avoid
unnecessary memory usage.

As a side-effect, CSSStyleSheetResource::sheetText is no longer const,
as it may cache m_decodedSheetText.

BUG= 642722 ,  653502 

Review-Url: https://codereview.chromium.org/2290983003
Cr-Commit-Position: refs/heads/master@{#424941}

[add] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/LayoutTests/http/tests/security/subresourceIntegrity/resources/mark-result-red.css
[add] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/LayoutTests/http/tests/security/subresourceIntegrity/resources/mark-result2-blue.css
[add] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/LayoutTests/http/tests/security/subresourceIntegrity/subresource-integrity-load-css-after-failed-integrity.html
[modify] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp
[modify] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.h
[modify] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/Source/core/fetch/Resource.cpp
[modify] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/Source/core/fetch/Resource.h
[modify] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
[modify] https://crrev.com/afa48c3ed31f7229c306ce7cda62111be593f719/third_party/WebKit/Source/core/inspector/InspectorPageAgent.cpp

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/3305344cb14705b1c8cb802cfd65e49d375aff85

commit 3305344cb14705b1c8cb802cfd65e49d375aff85
Author: Hiroshige Hayashizaki <hiroshige@chromium.org>
Date: Wed Aug 02 22:14:28 2017

Move SubresourceIntegrity calls to Resource

This CL moves SubresourceIntegrity calls to Resource, just before
CheckNotify(), where Resource::Data() is always available.
This makes
- SubresourceIntegrity always checked if integrity metadata is set, and
- SubresourceIntegrity and ResourceIntegrityDisposition control
  not depend on ResourceClients (ClassicPendingScript and LinkStyle).
  This removes Resource::SetIntegrityDisposition(), and
  and unblocks https://chromium-review.googlesource.com/c/562859/.

This CL also makes Resource cache SubresourceIntegrity::ReportInfo
in Resource, and thus outputs SRI console error messages and update
UseCounters for every classic script and stylesheet that shares
a Resource, not only for the first use ( Issue 585267 ).

Bug:  746115 ,  701943 ,  585267 ,  653502 
Change-Id: I03e7c22319980bd297cb5d9fb58589966a0b2f71
Reviewed-on: https://chromium-review.googlesource.com/576950
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Reviewed-by: Daniel Vogelheim <vogelheim@chromium.org>
Commit-Queue: Hiroshige Hayashizaki <hiroshige@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491526}
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/LayoutTests/http/tests/security/subresourceIntegrity/clear-integrity-attribute-expected.txt
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/LayoutTests/http/tests/security/subresourceIntegrity/shared-with-xhtml-expected.txt
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/core/dom/ClassicPendingScript.cpp
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/core/html/LinkStyle.cpp
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/core/loader/resource/ScriptResource.cpp
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/core/loader/resource/ScriptResource.h
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/platform/loader/SubresourceIntegrity.cpp
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/platform/loader/SubresourceIntegrity.h
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/platform/loader/fetch/Resource.cpp
[modify] https://crrev.com/3305344cb14705b1c8cb802cfd65e49d375aff85/third_party/WebKit/Source/platform/loader/fetch/Resource.h