IPC send the screen color profile from the browser to the renderer

views in the WasResized() IPC flow. The color profile is sent when
a tab is first added to the browser, and subsequently when the tab
changes monitor, via NotifyScreenInfoChanged(), which is driven by
windowDidChangeBackingProperties on mac and by gfx::Display change
monitoring on the Aura ports (win, linux).

On mac, the windowDidChangeBackingProperties message also fires if
a user changes screen color profile via configuration dialogs. The
Aura ports have no such configuration message, a problem that will
need to be solved some other way, perhaps via UI support.

The color profile of a renderer host view is fetched from its top-
level native window (the browser window). And yes, it's indeed odd
that a host view on mac must ask its WebContents for its top-level
native window.

The profile update requires two helpers DispatchColorProfile() and
SendColorProfile() because the win port may read disk, and is sent
in a separate IPC so the WasResized() IPC is never blocked waiting
on a disk read.

Background pages of extensions and similar have 0x0 size and never
participate in the NotifyScreenInfoChanged() WasResized() flow and
do not need the color profile besides (such pages do not paint). A
DCHECK in SendColorProfile() checks that condition: the view_ must
have non-zero size.

A stub implementation is provided for Android for compilation, but
color profile support on Android (mobile) is not recommended.

This work is guarded by the --enable-image-color-profiles flag.

BUG=368663

Review URL: https://codereview.chromium.org/1267123003

Cr-Commit-Position: refs/heads/master@{#345609}

1 files changed, 1 insertions, 0 deletions

diff --git a/content/test/test_render_view_host.h b/content/test/test_render_view_host.h
index 0e0a579..bf056fb 100644
--- a/content/test/test_render_view_host.h
+++ b/content/test/test_render_view_host.h
@@ -132,6 +132,7 @@ class TestRenderWidgetHostView : public RenderWidgetHostViewBase {
   void UnlockCompositingSurface() override {}
 #endif
   void GetScreenInfo(blink::WebScreenInfo* results) override {}
+  bool GetScreenColorProfile(std::vector<char>* color_profile) override;
   gfx::Rect GetBoundsInRootWindow() override;
   gfx::GLSurfaceHandle GetCompositingSurface() override;
   bool LockMouse() override;