Revert 227233 "Added histograms to see if the interval between c..."

> Added histograms to see if the interval between consecutive connects has
> an impact on connect time.
> 
> R=jar@chromium.org
> NOTRY=true
> 
> Review URL: https://codereview.chromium.org/26098002

TBR=rtenneti@chromium.org

Review URL: https://codereview.chromium.org/26212002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227243 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227243
Reflect image dimensions from imageMediaMetadata provided by Drive API in the Mosaic view.

Before, Files App didn't have access to dimensions of non-cached Drive images, since the dimensions had to be extracted from content, which wasn't available. However, recently we added support for imageMediaMetadata fields for Drive images, which provide dimensions as well as orientation with metadata.

This patch makes Mosaic view use these information to display the thumbnails with correct dimensions, instead of using a fallback.

Along the way, the image loader has been adjusted to use the provided orientation from Drive metadata, if available.

TEST=Tested manually. Partly covered by browser_tests.
BUG=258331
R=yoshiki@chromium.org

Review URL: https://codereview.chromium.org/25507009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@227244 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 227244