Add PhysicalWeb.hasPrerequisites()

Add PhysicalWeb.hasPrerequisites()

Often, the Physical Web and portions of Chrome triggering the
Physical Web need to check not only if the feature is turned on, but if
other prerequisites are met.  This change offers that method and begins
using it.

BUG=685856

[cco3, 2017-01-31 00:36:30]

cco3@chromium.org changed reviewers:
+ iankc@google.com, mattreynolds@chromium.org

[cco3, 2017-01-31 00:36:30]

Matt, this is in anticipation of Ian's work.

[mattreynolds, 2017-01-31 01:28:51]

lgtm

https://codereview.chromium.org/2664053002/diff/1/chrome/android/java/src/org...
File
chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java
(right):

https://codereview.chromium.org/2664053002/diff/1/chrome/android/java/src/org...
chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java:43:
* Returns whether we have the necessary permissions to begin Physical Web
scanning.
Add javadoc (@return boolean)

[cco3, 2017-01-31 01:34:13]

cco3@chromium.org changed reviewers:
+ dtrainor@chromium.org

[cco3, 2017-01-31 01:34:13]

https://codereview.chromium.org/2664053002/diff/1/chrome/android/java/src/org...
File
chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java
(right):

https://codereview.chromium.org/2664053002/diff/1/chrome/android/java/src/org...
chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java:43:
* Returns whether we have the necessary permissions to begin Physical Web
scanning.
On 2017/01/31 01:28:51, mattreynolds wrote:
> Add javadoc (@return boolean)

I've been told not to put obvious returns, but I have no opinion on this.

[David Trainor- moved to gerrit, 2017-02-01 06:59:37]

lgtm

https://codereview.chromium.org/2664053002/diff/1/chrome/android/java/src/org...
File
chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java
(right):

https://codereview.chromium.org/2664053002/diff/1/chrome/android/java/src/org...
chrome/android/java/src/org/chromium/chrome/browser/physicalweb/PhysicalWeb.java:43:
* Returns whether we have the necessary permissions to begin Physical Web
scanning.
On 2017/01/31 01:34:13, cco3 wrote:
> On 2017/01/31 01:28:51, mattreynolds wrote:
> > Add javadoc (@return boolean)
> 
> I've been told not to put obvious returns, but I have no opinion on this.

I think just change the javadoc to "@return whether we have the necessary ..."

[cco3, 2017-02-01 17:42:28]

The CQ bit was checked by cco3@chromium.org

[cco3, 2017-02-01 17:42:29]

The patchset sent to the CQ was uploaded after l-g-t-m from
dtrainor@chromium.org, mattreynolds@chromium.org
Link to the patchset: https://codereview.chromium.org/2664053002/#ps20001
(title: "Add javadoc")

[commit-bot: I haz the power, 2017-02-01 17:42:49]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-01 19:04:14]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-02-01 19:04:16]

Try jobs failed on following builders:
  android_clang_dbg_recipe on master.tryserver.chromium.android (JOB_FAILED,
https://build.chromium.org/p/tryserver.chromium.android/builders/android_clan...)