919c89e204
Bug: 6628376 The issue here is that contentX & contentY can both be 0 if we are scrolling slowly enough as they are adjusted by the page's scale and can thus round down. However, this would result in us falling out of layer drag mode even though we haven't tried to scroll past the edge of the layer. Detect this case, and stay in layer scroll mode. Change-Id: I3c655d0d03e8f89887abbe718bd24699c133ee1a