If profiling is done with --log-source-code profview will now display
a "View source" link for each function in the tree view. Clicking this
will show a new source viewer, with sampled lines highlighted. See the
associated bug for screenshots.

This patch also fixes a bug in the profiler where the source info of
only the first code object for each function would be logged, and
includes some refactoring.

Bug: v8:6240
Change-Id: Ib96a9cfc54543d0dc9bef4657cdeb96ce28b223c
Reviewed-on: https://chromium-review.googlesource.com/1194231
Commit-Queue: Bret Sepulveda <bsep@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#55542}

Use !== instead of !=.

Bug: 
Change-Id: I3f8127d54b80973f9ea7bb6ddf25afd928cb3045
Reviewed-on: https://chromium-review.googlesource.com/753733Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Commit-Queue: Franziska Hinkelmann <franzih@chromium.org>
Cr-Commit-Position: refs/heads/master@{#49210}

Rather than lumping in parsing, bytecode compilation and optimized
compilation all into the same VM "compile" state, seperate them out
into individual states.  Additionally, add support for these states
to tickprocessor and profview.

Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: I5be943e23cae042e32e9ccb24415c67c18658b4b
Reviewed-on: https://chromium-review.googlesource.com/608973
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47283}

Review-Url: https://codereview.chromium.org/2811953003
Cr-Commit-Position: refs/heads/master@{#44561}

This adds optimization and deoptimization counts to the Web UI. Also, the function timeline
now shows optimization and deoptimization marks.

Review-Url: https://codereview.chromium.org/2753543006
Cr-Commit-Position: refs/heads/master@{#44033}

When displaying a single function's timeline, display all its variants
(colour-coded by kind) instead of just the ones with the same code-id.
This allows us to see all optimised versions of a function, as well as
changes between optimised and unoptimised.

Drive-by -- Do some rounding to get rendering pixel-perfect.

Change-Id: I385c83b39414ac5e59208b7a25b488d6a283e2b0

NOTRY=true

Change-Id: I385c83b39414ac5e59208b7a25b488d6a283e2b0
Reviewed-on: https://chromium-review.googlesource.com/455833
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Jaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#43894}

Adds a bar below the current timeline view which can show the time
when an individual function was on the stack. Functions in the call
stack are now clickable to show them in this view.

Sections where the function was on the stack, but not at the top, are
displayed at half height.

Review-Url: https://codereview.chromium.org/2737083003
Cr-Commit-Position: refs/heads/master@{#43673}

Review-Url: https://codereview.chromium.org/2736723003
Cr-Commit-Position: refs/heads/master@{#43614}

The function list is now filtered by category by default, and sorting improved to break ties better.

Since the butterfly trees get massive, I had to start expanding the call trees on demand. This is implemented by keeping track of all ticks that cross given tree node (+ position where they crosses it). This seems to work quite well - in subsequent CL, I am planning to flip the bottom-up and top-down trees to use this.

Review-Url: https://codereview.chromium.org/2730293002
Cr-Commit-Position: refs/heads/master@{#43602}

Improvements:
- top-down call tree.
- interactive restriction to time interval.

Review-Url: https://codereview.chromium.org/2696903002
Cr-Commit-Position: refs/heads/master@{#43599}